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Charles V (24 February 1500 – 21 September 1558) was Holy Roman Emperor and Archduke of Austria from 1519 to 1556, King of Spain from 1516 to 1556, and Lord of the Netherlands as titular Duke of Burgundy from 1506 to 1555. He was heir to and then head of the rising House of Habsburg during the first half of the 16th century. His dominions in Europe included the Holy Roman Empire, extending from Germany to northern Italy with direct rule over the Austrian hereditary lands and the Burgundian Low Countries, and Spain with its possessions of the southern Italian kingdoms of Naples, Sicily and Sardinia. In the Americas, he oversaw both the continuation of the long-lasting Spanish colonization as well as a short-lived German colonization. The personal union of the European and American territories of Charles V was the first collection of realms labelled "the empire on which the sun never sets".

Charles was born in Flanders to Habsburg Archduke Philip the Handsome, the son of Emperor Maximilian I and Mary of Burgundy, and Joanna of Castile, younger child of Isabella I of Castile and Ferdinand II of Aragon, the Catholic Monarchs of Spain. The heir of his four grandparents, Charles inherited all his family dominions at a young age. After the death of his father Philip in 1506, he inherited the Habsburg Netherlands, originally held by his paternal grandmother Mary. In 1516, inheriting the dynastic union formed by his maternal grandparents Isabella I and Ferdinand II, he became King of Spain as co-monarch of the Crowns of Castile and Aragon with his mother, who was deemed incapable of ruling due to mental illness. Spain's possessions at his accession also included the Castilian colonies of the West Indies and the Spanish Main as well as the Aragonese kingdoms of Naples, Sicily and Sardinia. At the death of his paternal grandfather Maximilian in 1519, he inherited Austria and was elected to succeed him as Holy Roman Emperor. He adopted the Imperial name of Charles V as his main title, and styled himself as a new Charlemagne.

Charles V revitalized the medieval concept of universal monarchy. With no fixed capital city, he made 40 journeys through the different entities he ruled; he spent a quarter of his reign travelling within his realms. Although his empire came to him peacefully as inheritances from strategic marriages, he spent most of his life waging war, exhausting his own royal revenues and leaving debts to his successors in his attempt to defend the integrity of the Holy Roman Empire from the Protestant Reformation, the expansion of the Muslim realms of the Ottoman Empire, and in a series of wars with France. The Imperial wars were fought by German Landsknechte, Spanish tercios, Burgundian knights, and Italian condottieri. Charles V borrowed money from German and Italian bankers and, in order to repay such loans, he relied on the proto-capitalist economy of the Low Countries and on the flow of precious metal, especially silver, from New Spain and Peru to Spain, which caused widespread inflation. During his reign his realms expanded by the Spanish conquest of the Aztec and Inca empires by the Spanish conquistadores Hernán Cortés and Francisco Pizarro, as well as the establishment of Klein-Venedig by the German Welser family in search of the legendary El Dorado. In order to consolidate power early in his reign, Charles overcame two insurrections in Spain (the Comuneros' Revolt and Brotherhoods' Revolt) and two German rebellions (the Knights' Revolt and Great Peasants' Revolt). He suppressed a major rebellion of Spanish colonists in Peru in the 1540s.

Crowned King in Germany, Charles sided with Pope Leo X and declared Martin Luther an outlaw at the Diet of Worms (1521). The same year, Francis I of France, surrounded by the Habsburg possessions, started a war in Italy that lasted until the Battle of Pavia (1525), which led to the French king's temporary imprisonment. The Protestant affair re-emerged in 1527 as Rome was sacked by an army of Charles's mutinous soldiers, largely of Lutheran faith. In the following years, Charles V defended Vienna from the Turks and obtained a coronation as King of Italy and Holy Roman Emperor from Pope Clement VII. In 1535, he annexed the vacant Duchy of Milan and captured Tunis. Nevertheless, the loss of Buda during the struggle for Hungary and the Algiers expedition in the early 1540s frustrated his anti-Ottoman policies. After years of negotiations, Charles V had come to an agreement with Pope Paul III for the organization of the Council of Trent (1545). The refusal of the Lutheran Schmalkaldic League to recognize the council's validity led to a war, won by Charles V with the imprisonment of the Protestant princes. However, Henry II of France offered new support to the Lutheran cause and strengthened a close alliance with the Ottoman Sultan Suleiman the Magnificent.

Ultimately, Charles V conceded the Peace of Augsburg and abandoned his multi-national project with a series of abdications in 1556 that divided his hereditary and imperial domains between the Spanish Habsburgs, headed by his son Philip II of Spain, and the Austrian Habsburgs, headed by his brother Ferdinand. Ferdinand had been Archduke of Austria in Charles's name since 1521 and the designated successor as emperor since 1531. The Duchy of Milan and the Habsburg Netherlands were also left in personal union to the King of Spain, although initially also belonging to the Holy Roman Empire. The two Habsburg dynasties remained allied until the extinction of the Spanish line in 1700. In 1557, Charles retired to the Monastery of Yuste in Extremadura and died there a year later.

Birth and inheritances
"You, noble prince Charles, are more blessed than Alexander the Great. He for his part had seized an immense empire, but not without bloodshed...you were born to a splendid empire...you owe it to heaven that your empire came to you without the shedding of blood, and no one suffered for it."

Heritage
Charles of Habsburg was born on 24 February 1500 in the Prinsenhof of Ghent, a Flemish city of the Burgundian Low Countries, to Philip of Habsburg and Joanna of Trastámara. His father Philip, nicknamed Philip the Handsome, was the firstborn son of Maximilian I of Habsburg, Archduke of Austria as well as Holy Roman Emperor, and Mary the Rich, Burgundian duchess of the Low Countries. His mother Joanna, known as Joanna the Mad for the mental disorders afflicting her, was a daughter of Ferdinand II of Aragon and Isabella I of Castile, the Catholic Monarchs of Spain from the House of Trastámara. The political marriage of Philip and Joanna was first conceived in a letter sent by Maximilian to Ferdinand in order to seal an Austro-Spanish alliance, established as part of the League of Venice directed against the Kingdom of France during the Italian Wars.

The organization of ambitious political marriages reflected Maximilian's practice to expand the House of Habsburg with dynastic links rather than conquest, as exemplified by his saying "Let others wage war, you, happy Austria, marry". The marriage contract between Philip and Joanna was signed in 1495, and celebrations were held in 1496. Philip was already Duke of Burgundy, given Mary's death in 1482, and also heir apparent of Austria as honorific Archduke. Joanna, on the other hand, was only third in the Spanish line of succession, preceded by her older brother John of Castile and older sister Isabella of Aragon. Although both John and Isabella died in 1498, the Catholic Monarchs desired to keep the Spanish kingdoms in Iberian hands and designated their Portuguese nephew Miguel da Paz as heir presumptive of Spain by naming him Prince of the Asturias. Only a series of dynastic accidents eventually favored Maximilian's project.

Charles was given birth in a bathroom of the Prinsenhof at 3:00 a.m. by Joanna not long after she attended a ball despite symptoms of labor pains, and his name was chosen by Philip in honour of Charles I of Burgundy. According to a poet at the court, the people of Ghent "shouted Austria and Burgundy throughout the whole city for three hours" to celebrate his birth. Given the dynastic situation, the newborn was originally heir apparent only of the Burgundian Low Countries as the honorific Duke of Luxembourg and became known in his early years simply as Charles of Ghent. He was baptized at the Saint Bavo's Cathedral by the Bishop of Tournai: Charles I de Croÿ and John III of Glymes were his godfathers; Margaret of York, Duchess of Burgundy and Margaret of Austria, Duchess of Savoy his godmothers. Charles's baptism gifts were a sword and a helmet, objects of Burgundian chivalric tradition representing, respectively, the instrument of war and the symbol of peace. In 1501, Philip and Joanna left Charles to the custody of Margaret of York and went to Spain. They returned to visit their son very rarely, and thus Charles grew up in the Low Countries practically without his parents. The main goal of their Spanish mission was the recognition of Joanna as Princess of Asturias, given prince Miguel's death a year earlier. They succeeded despite facing some opposition from the Spanish Cortes, reluctant to create the premises for Habsburg succession. In 1504, as Isabella passed away, Joanna became Queen of Castile. Philip was recognized King in 1506 but died shortly after, an event that drove the mentally unstable Joanna into complete insanity. She retired in isolation into a tower of Tordesillas. Ferdinand took control of all the Spanish kingdoms, under the pretext of protecting Charles's rights, which in reality he wanted to elude, but his new marriage with Germaine de Foix failed to produce a surviving Trastámara heir to the throne. With his father dead and his mother confined, Charles became Duke of Burgundy and was recognized as prince of Asturias (heir presumptive of Spain) and honorific archduke (heir apparent of Austria).

Low Countries


The Burgundian Low Countries, also called "Netherlands", "Flanders", or "Belgica", were Charles's homeland and originally included Flanders, Artois, Brabant, Limburg, Luxembourg, Hainaut, Holland, Namur, Mechelen, and Zeeland. Charles inherited those territories, as well as the exclaves of Franche-Comté and Charolais, when his father Philip died. On 15 October 1506, he was named Lord of the Netherlands as Duke Charles II of Burgundy by the parliamentary body of the States General. The remaining provinces of the Low Countries, initially outside of Charles's jurisdiction, were Guelders, Friesland, Utrecht, Overijssel, Groningen, Drenthe, and Zutphen. Another territory not included in the Burgundian inheritance was Burgundy proper, annexed by France in 1477. As a young lord, Charles grew up with two major political goals: recover Burgundy proper and unite the seventeen provinces of the Low Countries under sole Habsburg rule. By the end of his reign, he would have failed in the former objective but succeeded in the latter.

The Low Countries held an important place in Europe for their strategic location, and the wealthy Flemish cities were flourishing in trade and experiencing a transition to capitalism. Although located within the Holy Roman Empire and its borders, those territories were formally divided between fiefs of the German kingdom and French fiefs (such as Charles's birthplace of Flanders) and thus formed, as Henri Pirenne put it, "a state made up of the frontier provinces of two kingdoms". Given that Charles ascended to the ducal throne as a minor, Emperor Maximilian appointed Margaret of Austria, Duchess of Savoy (Charles's aunt and Maximilian's daughter) as his guardian and regent. Charles viewed and treated Margaret as his mother and grew up in her palace of Mechelen along with his sisters. Margaret soon found herself in conflict with France over the question of Charles's requirement to pay homage to the French king in his position as Duke of Burgundy and Count of Flanders.

Charles's entourage, which consisted of hundreds of members, was composed primarily of fellow countrymen such as his chamberlain William de Croÿ and his tutor Adrian of Utrecht. Because of this, the young duke grew up speaking exclusively his native languages: French and Dutch. Very important to Charles was the Burgundian Order of the Golden Fleece, a forum of knights and nobles of which he was a member and later the grand master. The basis of Charles's beliefs was formed in this environment, including his Burgundian chivalric culture and the desire of Christian unity to fight the infidel in the tradition of medieval figures born in the Low Countries such as Charlemagne and Godfrey of Bouillon, whose biographies he often read.

Emperor Maximilian decided to emancipate his grandson in 1515 at the great hall of the Coudenberg Palace in Brussels, where Charles would abdicate 40 years later. Once emancipated, he undertook his first voyage to tour the Burgundian provinces and made an acclaimed Joyous Entry in Bruges and other Flemish cities. Meanwhile, he refused to attend the coronation ceremony of the new king of France Francis I of Valois as a French vassal. This event marked the first episode of a long rivalry between the two monarchs.

Spanish kingdoms
In 1479, Spain was formed as a dynastic union of two crowns by virtue of the marriage and joint rule of Isabella I of Castile and Ferdinand II of Aragon, the Trastámara Catholic Monarchs. Upon the death of King Ferdinand II on 23 January 1516, his daughter Joanna the Mad, formally Queen of Castile since the death of Isabella in 1504 but effectively under her father's protection, became Queen of Aragon as well. Ferdinand's testament recognized Joanna as sole Queen of the Spanish kingdoms with Charles as governor-general and cardinal Francisco Jiménez de Cisneros as regent. Joanna's condition of insanity persisted and, as suggested by the Flemings and Maximilian, Charles claimed for himself the Spanish kingdoms jure matris. After the celebration of Ferdinand II's obsequies on 14 March 1516, Charles was crowned King in the Cathedral of St. Michael and St. Gudula of Brussels as Charles I of Spain or Charles I of Castile and Aragon, controlling both Spanish crowns in personal union.

Spanish kingdoms varied in their style and traditions. Castile was an increasingly authoritarian state where the monarch's own will easily overrode legislative and justice institutions. Its crown comprised most of Spain, including the Iberian Navarre conquered in 1512 and the former Islamic Kingdom of Granada annexed at the end of the Reconquista in 1492. The crown of Aragon included the remaining Spanish kingdoms of Aragon proper, Barcelona, Catalonia, and Valencia, and its monarchy was considered to be, differently from Castile and similarly to Navarre, the product of a contract with the people. Viceroyalties of the Spanish crowns formed the Spanish Empire and included the West Indies and the Tierra Firme in the Americas, discovered by Cristopher Columbus for Castile in 1492, as well as the Aragonese possessions in southern Italy: Sicily, Sardinia, and the recently conquered (1503) Kingdom of Naples.

In August 1516, the ambassadors of Charles I of Spain and Francis I of France signed the Treaty of Noyon, which, along with the Treaty of Brussels signed between Maximilian I, Holy Roman Emperor and the French king, ended the first phase of the Franco-Habsburg Italian Wars, leaving the Imperial Duchy of Milan in French hands and securing the Kingdom of Naples under Spanish rule. In the same year, the Italian humanist Luigi Marliani coined Charles's personal motto "Plus Oultre" (later incorrectly Latinized in Plus Ultra, which became the Spanish national motto), signifying "further beyond" and associated with the expansion of his inheritance as a reverse of the mythological Non Plus Ultra written on the Pillars of Hercules. A year later, Charles I embarked for Spain, where his accession was contested and a succession crisis was unfolding, thus beginning his first voyage outside of the Low Countries and arriving in his new kingdoms in September 1517. Jiménez de Cisneros accepted the fait accompli and came to meet him but fell ill along the way, not without a suspicion of poison, and died before meeting the King. As regent, Cisneros was replaced by Charles's tutor Adrian of Utrecht, who was appointed Bishop of Tortosa and became himself a cardinal. Charles visited his mother in Tordesillas and, meeting for the first time his younger brother Ferdinand, born in Castile and a popular candidate for the position of King, ordered him to abandon Spain. Charles then entered into negotiations with the Cortes of Castile and Aragon in order to be proclaimed king of the Spanish crowns jointly with his mother.

At his arrival in Spain, Charles was seen as a foreign prince of Flemish-Austrian background and his Burgundian-Habsburg entourage was accused to exploit the resources and offices of the Spanish kingdoms. For this reason, and due to the irregularities of Charles assuming the royal title while his mother was alive, the negotiations with the Castilian Cortes in Valladolid proved difficult. Eventually, the Cortes accepted Charles as king and paid homage to him in Valladolid in February 1518. Charles proceeded to Aragon and, once again, he managed to overcome the resistance of the Aragonese Cortes in order to be recognized as king. A year later, he was still negotiating with the Catalan Corts to be recognized as count of Barcelona and had not attended, despite requested, similar ceremonies in Valencia and Navarre, causing some grievances. By 1519, the Cortes of Castile and Aragon imposed the following conditions on Charles: he would learn to speak Spanish; he would cease to appoint foreigners for the high offices of Spain; he was prohibited from taking more than a fifth (Quinto Real) of precious metals coming from the Americas; and he would respect the rights of his mother, Queen and co-monarch Joanna. In fact, Joanna made little effect on nation policies, as she was kept imprisoned till her death in 1555.

Austrian lands and Imperial election
After Maximilian's death on 12 January 1519, Charles became Archduke of Austria and head of the House of Habsburg. As Charles I of Austria, he inherited the Duchy of Austria, Styria, Tyrol, Further Austria, Carinthia, Carniola, and the Austrian Littoral. As head of the House, he inherited the Imperial ideology exemplified by the dynastic motto A.E.I.O.U (Austria Est Imperare Orbi Universo–Austria is to rule the universal world) which seemed to materialize in the context of the now global Habsburg empire. To achieve a position of primacy in European affairs, Charles presented to the seven prince-electors (Palatinate, Saxony, Brandeburg, Mainz, Trier, Cologne, and Bohemia) his candidacy to rule the Holy Roman Empire, whose throne was occupied by the Habsburg Archdukes of Austria since the mid-1400s.

The Holy Roman Empire was also known as Holy Roman Empire of the German Nation and its greatest constituent realm was the Kingdom of Germany, divided into many princedoms, bishoprics, city-states, and other polities. The other large constituent kingdom was Imperial Italy, formed by several regional states to the north of the Papal States. Francis I of France, fearing that Charles's election would have resulted in the loss of French-held Milan and in the Habsburg Encirclement of his kingdom, attempted to secure the Imperial throne for himself through bribery. Pope Leo X, uneasy with the cumulation of power in Habsburg or French hands, invited various princes to enter the electoral race, hoping for the victory of a third candidate. Nonetheless, Leo X also signed secret alliances with both Charles and Francis in case one of them won the Imperial election, marking the first episode of Papal double-play in the French-Habsburg rivalry.

Charles borrowed large amounts of money from the Fuggers and the Welsers, the two major German banking families, and surpassed Francis in the race to pay bigger bribes to the electors. He also signed with the German princes an electoral capitulation (Wahlkapitulation) in which he promised to "protect and shield" Germany's liberties and began to learn German, Italian, and Latin. Finally, Charles advised the princes against electing a foreign king and declared himself a "German by blood and stock" on the ground that Austria, the home of his dynasty, and the Low Countries, where he was born, were then often considered part of Germany.

On 28 June 1519, Charles was elected Holy Roman Emperor by the prince-electors reunited in Frankfurt. A Papal dispensation, similar to one conferred to Maximilian in 1508, allowed him to use the Imperial title even in absence of Papal coronation. Informed of the election by Duke Frederick, Count Palatine, Charles proclaimed the Imperial title to be "so great and sublime an honour to outshine all other worldly titles" and thus became universally known by the Imperial name of Charles V.

Coronation in Aachen
The traditional ideology of the Holy Roman Empire implied sovereignty over the entire Christian world. However, such a theoretical claim was never implemented in practice. The Italian statesman Mercurino di Gattinara, a Piedmontese counselor of the Duchess of Savoy Margaret of Austria, known for his appreciation of Dante Alighieri's political treatise De Monarchia, reproposed the medieval idea and wrote to the Emperor:

"'Sire, God has been very merciful to you: he has raised you above all the kings and princes of Christendom to a power such as no sovereign has enjoyed since your ancestor Charles the Great. He has set you on the way towards a world monarchy, towards the uniting of all Christendom under a single shepherd.'"

Charles V endorsed the project and appointed Gattinara grand-chancellor of the Empire. Given that his dynastic fortunes gave him sovereignty in much of Western Europe and in the Americas, the Emperor believed it was his divine mission to transform the medieval dream into reality.

He left a tumultuous situation in Spain, where the revolt of the Comuneros in Castile and the revolt of the Brotherhoods in Aragon outbroke among the lower classes to contest Habsburg rule, and returned to the Low Countries in 1520 via England. In two meetings with Henry VIII of England, first in Canterbury and then in Gravelines, he dissuaded the English king from joining an anti-Imperial alliance proposed by Francis I of France at the Field of the Cloth of Gold. Following a festival held at his Palace of Coudenberg in order to celebrate the election, Charles crossed the Rhine and arrived in Germany for the first time.

On 26 October 1520, Charles V was crowned King in Germany at the Palatine Chapel of the Aachen Cathedral and swore his oath as Holy Roman Emperor. Seated on the throne of Charlemagne while holding the Imperial regalia, namely the globus cruciger in his right hand and the Carolingian sceptre in his left, he promised to defend and expand the Empire, administer justice, observe the Roman Catholic faith, and become the protector of the Church (Defensor Ecclesiae). Later he called for the first general meeting of German princes of his era, to be held in January 1521 at the Imperial Diet of Worms.

"The empire on which the sun never sets"
While Charles V assumed the functions of Holy Roman Emperor in Germany, the conquistador Hernán Cortés informed him of the ongoing Spanish conquest of the Aztec Empire, including the discovery of Tenochtitlan and the death of its ruler Montezuma during a local revolt, in a relation letter that widely circulated and became the basis of European knowledge on the Aztec Empire. Combined with the contemporary circumnavigation of the globe by Magellan and with the idea (proposed for the first time, although not realized) of constructing an American Isthmus canal in Panama, this success convinced the Emperor of his divine mission to unify the world as the leader of Christendom. In his letter, Cortés claimed to have added to the empire as many provinces as Charles's Burgundian, Spanish, and Austrian ancestors, and described Mexico to be "no less worthy than Germany to warrant your assuming anew the title of Emperor, of which, by the grace of God, Your Sacred Majesty already possesses the title."

Charles V ratified the Spanish conquest of the Aztec Empire, and would also oversee the beginning of the Spanish conquest of Peru and the establishment of a brief German colony in Venezuela (Klein Venedig, 1528–1546). He regarded the Americas as a land to evangelize and, even more importantly, as a source of enormous amounts of bullion to strengthen the Imperial treasury. As the conquistador Bernal Díaz del Castillo observed, "We came to serve God and his Majesty, to give light to those in darkness, and also to acquire that wealth which most men covet." Precious metals and treasures coming from the colonies were minted into coins in Spain, incidentally contributing to a period of inflation known as the "Spanish price revolution", and then transferred to the financial centres of the Low Countries in order to repay Charles's debts contracted with the local agencies of German and Italian bankers. Those resources sustained the wars of the Holy Roman Empire and made the fortunes of Genoa and Augsburg (seat of the most important banks of the time), of Seville's Casa de la Moneda, and of the Flemish port city of Antwerp, which became the centre of the entire international economy. During Charles's reign, over 15 million ducats' worth of bullion reached the Imperial treasury but the rising inflation impacted the cost of borrowing which grew from 17% to 48%. Estimates concerning the fiscal revenues of Charles's European possessions vary significantly, with some authors even claiming that the 16th fiscal revenues of the Low Countries alone were equivalent to seven times the amount of resources collected in the Americas.

This financial system allowed Charles V to maintain a vast Imperial army of German landsknechts (the bulk of the army), Spanish tercios, Burgundian knights, and Italian condottieri. The universal empire of Charles V, called by poets "the empire on which the sun never sets", was also cosmopolitan in character: the Emperor was a travelling monarch and the itinerant Imperial court was open to men from all the Habsburg dominions. Therefore, Charles's counselors and generals included Germans (Henri III of Nassau, Frederick II of Palatine, Albert Alcibiades, Margrave of Brandenburg-Kulmbach, John of Brandeburg, Maurice of Saxony, Georg von Frundsberg), Spaniards (Hugo of Moncada, Fernando Álvarez de Toledo, Antonio de Guevara, Francisco de los Cobos, Alfonso de Valdés), Italians (Mercurino di Gattinara, Emmanuel Philibert, Duke of Savoy, Francesco D'Avalos, Marquis of Vasto, Andrea Doria, Ferrante Gonzaga), and Flemings (Charles de Lannoy, Philibert of Chalon, Adrian of Utrecht, William de Croÿ, Nicolas Perrenot de Granvelle, William the Silent). On other hand, Charles's dominions formed an "empire with no heartland" or a "hybrid empire" with multiple centres, suffering from the lack of a metropole and of a capital city in an age marked by the rise of more centralized national monarchies such as France and England.

Diet of Worms
At the Diet of Worms, the Reformation movement was brought to the Imperial attention of Charles V. The Emperor called Martin Luther to the Diet, promising him safe conduct if he would appear to illustrate his theological positions. Charles V relied on religious unity to govern his various realms, otherwise unified only in his person, and resolved that Luther's teachings represented a disruptive form of heresy. After Luther defended The Ninety-Five Theses and his writings in front of Charles V, the Emperor commented: "that monk will never make a heretic of me!”. Influenced by the Papal legate Girolamo Aleandro, Charles V outlawed Luther and issued the Edict of Worms (26 May 1521), making a declaration reflective not only of his thought on the matter but of his world view in general:

"'You know that my ancestors were the most Christian Emperors of the great nation of Germany, the Catholic kings of Spain, the archdukes of Austria, and the dukes of Burgundy, who all were, until death, faithful sons of the Roman Church...I am therefore resolved to maintain everything which these my forebears have established to the present…and to settle this matter I will use all my dominions and possessions, my friends, my body, my blood, my life, and my soul. It would be a disgrace for you and me, the illustrious and renowned nation of Germany, privileged and pre-eminent as protector and defender of the Catholic faith, if heresy, or even just the suspicion of heresy, and the degradation of the Christian religion were to return to the hearts of men in our time to our perpetual dishonour.'"

Nonetheless, Charles V kept his word and Martin Luther was free to leave the city by virtue of the Imperial safe conduct. However, Frederick the Wise, elector of Saxony and patron of the Reformation, lamented the outcome of the Diet. On the road back from Worms, Luther was kidnapped by Frederick's men and hidden in a far away castle in Wartburg. There, he began to work on his German translation of the Bible. Several princes, intending to gain possession of the resources and lands of the Catholic Church in Germany, joined the Lutheran movement. A new religious denomination was emerging, but Charles V initially remained unaware of its spread as he was mostly concerned with the Italian Wars against France.

Four Years' War
While Charles V presided the Diet of Worms, Francis I of France sent his general Robert de la Marck to invade the Burgundian Low Countries and supported Henry II of Navarre in a campaign to recover the Iberian Navarre. The Emperor responded by declaring Francis deprived of Milan and formed an anti-French alliance with Pope Leo X (8 May 1521), who was interested in annexing the strategic territories of Parma and Piacenza, both part of French-held Milan. Thus, the Four Years' War began. Meanwhile, Cortés besieged (May 26) and occupied (August 13) Tenochtictlan, completing the conquest of the Aztec Empire. The ship carrying the main treasure of emperor Cuauhtémoc was captured by the French corsair Jean Fleury, but 120,000 ducats' worth of bullion reached the Imperial treasury during the Italian conflict. Renaissance Italy was described by Mercurino di Gattinara as "the principal foundation of empire" and both Francis I and Charles V, who were considered the most powerful European monarchs of the time, aspired to primacy in the rich peninsula. As the Renaissance historian Francesco Guicciardini explained:

"'If one of them [Charles V] ruled more kingdoms and states, the other [Francis I] deserved equal esteem, for his power was not scattered and divided in many places but concentrated in a united kingdom full of great wealth and with marvelous obedience of his people.'"

In September, Charles V closed the Diet of Worms in order to lead, for the first time in his life, a military campaign, commanding the Imperials against the invading forces of Francis I in the Low Countries. He successfully defended Flanders and won a battle at Tournai, while the Papal-Imperial army led by Prospero Colonna drove the French out of Milan, installed Francesco II Sforza to the Ducal throne, and restored the provinces of Parma and Piacenza to the Papal States. Those successes were confirmed with the Battle of Bicocca a year later. Pope Leo X died in his Roman villa following a banquet held to celebrate the French defeat. He was replaced by Adrian of Utrecht, Charles's Flemish tutor and his regent in Spain, who went to Rome to be crowned as Pope Adrian VI. In 1522, Charles V decided to leave the Low Countries and sail for Spain, now without a regent and where revolts throughout the country continued along with the war in Navarre. He confirmed Margaret of Austria as governor of the Low Countries, naming her president of the Burgundian Great Council and establishing a local inquisition to assist her in the research and destruction of Luther's books. For the regency and governorship of the Austrian lands, Charles secretly invested his brother Ferdinand with those territories: by the pacts of Worms (21 April 1521) and Brussels (7 February 1522), Ferdinand was appointed Archduke of Austria in the name of Charles V. By the same treaties, Charles promised to support Ferdinand's candidacy as the designated successor in the Empire and to pass him hereditary rights over Austria at the Imperial succession.

During the voyage from the Low Countries to Spain, Charles V visited England. His aunt, Catherine of Aragon, convinced her husband, King Henry VIII, to ally himself with the emperor. In 1522 and 1523, Charles V suppressed the Castilian and Aragonese revolts and ordered hundreds of executions until 1528. Military operations in Navarre ended in 1524, when the military leader Hondarribia surrendered to Charles's forces, although frequent cross-border skirmishes continued to occur for a number of years. In order to pacify Spain, the Emperor pardoned many rebels and honoured the agreements of 1517-1518 which chiefly consisted in appointing Castilians, rather than foreigners, for the high offices of Spain. Having already decided that his brother Ferdinand would succeed him in Austria and the Empire, Charles V also promised to celebrate his marriage in Spain and to give a Castilian heir to the Spanish throne. Thus, Spanish subjects were reconciled with Charles V. On the other hand, the price of reconciliation effectively consisted in accepting that a sizeable part of Spain's American resources was being used to sustain a foreign policy, that of the Holy Roman Empire, perceived to be in contrast to the country's interest by many Spaniards.

In Spain, Charles V reformed the administration following the Flemish conciliar system and created collateral councils, in addition to those established by Isabella of Castile and Ferdinand of Aragon, such as the Council of Finance (Consejo de Hacienda) in 1523, the Council of the Indies (Consejo de las Indias) in 1524, the Council of War (Consejo de Guerra) in 1526, and the Council of State (Consejo de Estado) in 1527. Similarly, Ferdinand was instructed to establish collateral councils in Austria such as the Privy Council (Geheimer Rat), the Aulic Council (Hofrat), the Court Chancellery (Hofkanzlei) and the Court Exchequer (Hofkammer). A regency council was also established in Germany, set up in the context of the imperial government, but proved ineffective in containing two major rebellions caused by the spread of Lutheranism: the Knights' Revolt of 1522–1523 and the peasants' revolt led by Thomas Muntzer in 1524–1525. The pro-Imperial Swabian League, in conjunction with Lutheran princes afraid of social revolts, massacred tens of thousands of rebels. However, Charles V, being absent from Germany, was not directly involved in the massacres and, similarly to what he did in Spain, he used the instrument of pardon to restore order and subsequently initiated a policy of tolerance towards the Lutherans.

Taking advantage of the aforementioned revolts in Spain and Germany, Francis I of France retook the initiative in Italy and, in 1524, crossed into Lombardy where Milan, along with a number of other cities, once again fell to his attack. Ultimately, Pavia alone held out and was put under siege by the French king. At this point, the new Pope Clement VII of the House of Medici abandoned the alliance with the Emperor and endorsed Francis I. On 24 February 1525, Charles's twenty-fifth birthday, an Imperial army of pike and shot regiments, consisting primarily of 12,000 Germans (Landsknechts) and 5,000 Spaniards (Tercios), arrived in Lombardy and destroyed the French cavalry at the Battle of Pavia. The Burgundian-Fleming general Charles de Lannoy, Imperial lieutenant and Viceroy of Naples, captured Francis I and imprisoned him in the nearby tower of Pizzighettone. The four-year long war with France was effectively over.

League of Cognac
Charles V and some of his principal counselors were informed of the victorious battle of Pavia by Lannoy's couriers during a meeting of the Imperial court held at the Alcazar of Madrid, where the Emperor was residing in preparation for his Spanish marriage with Isabella of Portugal. The Imperial court split in two factions: one, led by the grand-chancellor Gattinara, advocated for the invasion of France (the so-called Great Enterprise), in order to realize the unified Catholic empire; the other, led by Lannoy and his Flemish representatives with support from the German Henry III of Nassau-Breda (the favourite of Charles V) and the Spaniard Hugo of Moncada (who was captured and freed by the French during the war) advocated for the liberation of Francis I in exchange for the transfer of Burgundy proper to Charles V. The latter opinion reflected historic Flemish claims over Burgundy, as well the interests of Spaniards and Germans who opposed to initiate a new war only to realize Gattinara's universal dream, and it was the one ultimately endorsed by Charles V.

After signing the treaty of Rome with Clement VII, by which the House of Sforza was again restored to power in Milan and the Pope allied himself with Charles V for a second time, Lannoy brought the French king to the Alcazar in Spain. There, the French king and the Holy Roman Emperor agreed on the Treaty of Madrid (1526), whose content, according to the Renaissance historian Guicciardini, essentially reflected the proposal of Charles de Lannoy and Henry III of Nassau: Francis abandoned his claims over the Imperial duchy of Milan and gave Burgundy to Charles V in exchange for his freedom. Gattinara refused to co-sign it. Many diplomats and political thinkers of the time strongly criticized Charles V for his decision to liberate the King of France. Notably, Niccolò Machiavelli called the Emperor a "fool" in private letters to his friends. Indeed, once liberated, Francis I had the Parliament of Paris denounce the treaty on the ground that it had been signed under duress and declared a new war on Charles V, whose management for the Imperials was again entrusted to Gattinara.

France then joined the League of Cognac, which was formed by Clement VII with the Venetians, the Florentines, and the Sforza, since the troops of Charles V had reacted to Francis' actions by taking direct possession of Milan. An Imperial army formed primarily by German landsknechts led by Georg Frundsberg and Charles III, Duke of Bourbon defeated the League's forces commanded by Giovanni dalle Bande Nere in Tuscany, causing the end of Medici rule in Florence and the restoration of a Florentine Republic, and marched on Rome. At this point, the Pope reversed his previous position and proclaimed himself an ally of the Emperor. However, with Frundsberg wounded in previous battles and the Duke of Bourbon killed (possibly by Benvenuto Cellini), many mercenaries of Lutheran faith mutinied and sacked Rome in 1527. Although Charles V did not order the sack and formally denied responsibility, the event shocked Catholic royals. Henry VIII of England blamed the Emperor and sided with Francis I of France. In 1528, looking for new resources, Charles V assigned a concession over Venezuela Province to the Welsers, a banking and patrician family of the Imperial cities of Augsburg and Nuremberg, in compensation for his inability to repay debts owed and with the goal of finding the legendary golden city of El Dorado. The German colony, known as Klein-Venedig (little Venice), inclusive of newly founded settlements such as Neu-Augsburg (later Coro) and Neu-Nuremberg (later Maracaibo), lasted until 1546.

In 1529, representatives of Pope Clement VII and Charles V signed the treaty of Barcelona and thus restored the Papal-Imperial alliance. English support to France ceased. Francis I was now without allies and his Genoese admiral, Andrea Doria, joined Charles V. After Doria's private fleet escorted to Italy the Emperor, who left Isabella of Portugal as regent in Spain, Charles's aunt Margaret of Austria and Francis' mother Louise of Savoy agreed in 1529 to the treaty of Cambrai (also called the "Ladies' Peace"). Francis I retained Burgundy proper, a better result for France compared to the agreements of 1526, but accepted defeat in the Italian peninsula and abandoned his claims over Imperial Italy.

Coronation in Bologna and Diet of Augsburg
At the Congress of Bologna (1529-1530), Charles V gave several concessions to Clement VII: Francesco II of Sforza, an ally of the Pontiff, was again invested with the Duchy of Milan; the Catholic order of the Knights Hospitaller was entrusted with the government of Malta and Tripoli (Sicilian fiefs); the Papal House of Medici was restored to power in Florence by a Papal-Imperial army formed by 14,000 Italians, 8,000 Germans, and 6,000 Spaniards, all commanded by the Burgundian-Fleming general Philibert of Chalon and, following his death, by the Italian condottiero Ferrante Gonzaga. In exchange for the concessions received, Pope Clement VII crowned Charles V as King of Italy with the Iron crown and as Holy Roman Emperor with the Golden crown in the Basilica of San Petronio, Bologna. The two sovereigns rode under a single canopy followed by cardinals, Imperial soldiers, ambassadors of various states, and numerous princes: the Marquis of Monferrato carried the Imperial sceptre, the Duke of Urbino the Imperial sword, and the Duke of Savoy the crown itself. The figures of Constantine, Charlemagne, and Sigismund of Luxembourg were the examples set up in effigy for the Emperor to follow. The coronation of Bologna was the last Imperial coronation performed by a Pope.

In ten years, Charles V had successfully restored the power of the Holy Roman Empire to its medieval grandeur. Leaving Italy for Germany, the Emperor witnessed, in the Austrian city of Innsbruck, the death of Gattinara, the man largely responsible for the treaties of 1529 and for the coronation of 1530. At this point, Charles V became his own grand-chancellor and divided Gattinara's functions between two secretaries: Nicolas Perrenot de Granvelle, responsible for the Holy Roman Empire; and Francisco de los Cobos y Molina responsible for Spain and the Spanish possessions in the Americas and southern Italy. At the Diet of Augsburg (1530), the greatest Imperial assembly organized in Germany during the 16th century, Charles V recalled his recent success in pacifying Spain and Italy, rejected the Augsburg confession proposed by Luther's assistant Philip Melanchthon to recognize and regulate the Reformers' beliefs, and proclaimed his supreme authority in Christendom:

"'We have been hearing about the dispute over Our holy Christian faith, which in Our absence has spread and rooted itself in many dangerous sects that give rise to no little confusion and schism in Our common German nation...And so, having issued several laws for keeping the subjects of Our Spanish kingdom united and peaceful during Our absence, and in view of Our special love for and inclination to the German Nation and the Holy Roman Empire… We were able, praise be to God, to restore peace and order to Italy… and now, As Roman emperor and supreme steward of Christendom, it pertains to Our Imperial office to confess Our obligation to guard, protect, and maintain the holy Christian faith as it has been preserved until now.'"

"The problem of two emperors"


The Ottoman sultan Suleiman the Magnificent denied the global primacy of Charles V and wanted to affirm his own Imperial title as the supreme ruler of Islam. The problem of two emperors (Zweikaiserproblem) overlapped with the emerging Turkish threat (Turkengefahr): in 1526, Louis II, king of Hungary and Bohemia was defeated and killed at the Battle of Mohács by an army of Ottoman Turks; the event "sent a wave of terror over Europe". As the two elective thrones of Louis II were vacant, Charles V convinced the local nobles to elect his younger brother Ferdinand of Austria as king of Hungary and Bohemia in the Imperial name and under the Imperial protection.

Habsburg control of Bohemia was crucial for Charles V to retain a majority among the seven prince-electors, especially in times of political contrasts with the Lutherans. On the other hand, the position of Charles V and Ferdinand in Hungary was unstable. Only the northern part of the country was under Habsburg control; the southern part was occupied by the Ottoman Empire and, in the central portion of the former kingdom of Louis II, the Voivodeship of Transylvania of John Zápolya emerged as a buffer state. Thus, Hungary was a battleground between the Imperials and the Ottomans for most of Charles's reign. Initially, the Ottomans were even able to bring the conflict to Austria itself.

Siege of Vienna
The Turks besieged Vienna in 1529 and again in the following years, but the city, defended by Philip, Duke of Palatinate-Neuburg and Nicholas, Count of Salm, resisted and halted their advance. At the Diet of Augsburg in Germany (1530) the Ottoman advance was debated, but religious talks then prevented an immediate and collective counter-attack. The rejection of the Augsburg confession led in 1531 to the formation of the Schmalkaldic League by the now self-described Protestant princes. Despite this, Charles proved to have the majority of the prince-electors on his side as he had his brother Ferdinand elected King of the Romans, a title conferred to the future successor as Holy Roman Emperor, in Cologne (1531).

As the Turks temporarily suspended their operations, Charles focused on domestic affairs such as the approval of a penal code for all of Germany, known as the Constitutio Criminalis Carolina, and returned to the Low Countries in 1531. Margaret of Austria, who had died a year earlier, left the Burgundian Low Countries expanded to include Friesland (1524), Utrecht, and Overijssel (1528). The Emperor replaced her with his sister Mary of Hungary. To assist the new governor, Charles V created three collateral councils for the Low Countries (Privy Council, Council of Finances, and Council of State) and also promised: "i shall not forget you or my homeland, however far away i may be". Antwerp continued to flourish as a cosmopolitan center: in 1531, its bourse was opened "to the merchants of all nations".

Meanwhile, Suleiman began his third campaign to take Vienna in 1532, while the Turkish battle fleet headed for the Western Mediterranean. Charles V returned to Germany and, intending to avoid a religious conflict while in need of troops from all the German states to launch a campaign against the Ottomans, effectively suspended the Edict of Worms with the standstill of Nuremberg (1532). It was also agreed to postpone religious talks until the Pope called for an ecumenical council of the Catholic Church, to be held in Germany rather than Italy.

At the Diet of Regensburg (1532), Charles V raised an Imperial army of 12.000 Germans, 10.000 Spaniards, 10.000 Italians, and 4.000 Netherlanders. With the arrival of Protestant forces and additional troops, the Imperial army ultimately consisted of 120.000 infantry and 20.000 cavalry. Charles V, sharing the command of the army with Duke Frederick, Count of Palatine, led the Imperial forces to Vienna, strengthening the fortifications of the city, and then crossed the Danube. Meanwhile, the Imperial navy commanded by Andrea Doria captured the Ottoman fortresses of Coron and Patras in Greece. Suleiman was forced to retreat into Turkey and ended his campaign to take Vienna, where the Emperor made a triumphant return.

Tunisian campaign
The Emperor decided to continue his anti-Turkish struggle, with the goal of diverting Suleiman from launching other attacks against his possessions in central Europe and the Mediterranean. Informed of the capture of Inca Emperor Atahualpa by Francisco Pizarro at the Battle of Cajamarca (1532), Charles V ratified the beginning of the Spanish conquest of Peru and ordered the collection of resources for a Mediterranean enterprise in Ottoman Africa. Leaving Austria, he returned to Spain via Italy. A second Congress of Bologna (1533) between Clement VII and Charles V formally reconfirmed the pacts made in 1530 and denied Henry VIII of England a Papal dispensation to divorce from Catherine of Aragon, Charles's aunt, contributing to the English schism.

However, Clement VII went to Marseille in order to sign an agreement with Francis I and celebrate the marriage of his niece Caterina de Medici to Henri, son of the king (and future Henri II of France). Luckily for Charles, the troublemaker Clement VII died shortly after. He was replaced (1534) by Pope Paul III, who opted to remain neutral in the rivalry between Charles V and Francis I, displeasing both monarchs, in order to facilitate a Catholic alliance against the Ottoman Turks and the Protestants (Lutherans in Germany and Calvinists in France). France refused to take part in the project, but Charles V responded favorably.

The feared Ottoman admiral Hayreddin Barbarossa was the main target of Charles V. Barbarossa's Muslim Barbary corsairs, acting under the general authority and supervision of the Sultan, regularly devastated the Spanish and Italian coasts, crippling trade and chipping at the foundations of Habsburg power. In Barcelona, Charles V assembled an Imperial fleet carrying 10,000 Spaniards, 8,000 Germans, and 8,000 Italians. Sharing the command of the navy with Andrea Doria and of the landing forces with the Marquis of Vasto, the Emperor went to Sardinia, where he was joined by ships from Portugal, Malta, and the Papal States. From Sardinia, the Catholic coalition led by Charles V launched an attack on Tunis (1535), which served as the base of Barbary corsaires. The city was sacked and put under an Imperial puppet ruler of Islamic faith (Muley Hassan) as a tributary state of the Spanish kingdom of Sicily (an old tradition dating back to Frederick II, Holy Roman Emperor and King of Sicily), but Barbarossa and his men managed to escape to Algiers. Returning to Italy, Charles V appointed Ferrante Gonzaga as viceroy of Sicily with authority over a number of garrisons in Tunis and was celebrated as a new Scipio Africanus by the Sicilians.

Resumption of hostilities


As the last Sforza Duke died without heirs in 1535, Charles V incorporated the Imperial fief of Milan into his direct dominions. Francis I reacted in 1536 by occupying the Savoyard state, including Piedmont, and ignited a new phase of the Italian wars. Meanwhile, the Emperor made a triumphant entry in the ancient style in Rome to celebrate his victory in Tunis. At a meeting with Paul III, who declared his neutrality in the French-Imperial conflict, Charles V unsuccessfully tried to bring the Papal States on his side. On the other hand, a Franco-Ottoman alliance against the Emperor came into force.

Charles V thus made overtures to the Safavid Empire to open a second front against the Ottomans, in an attempt at creating a Habsburg-Persian alliance. Contacts were positive, but rendered difficult by enormous distances. In effect, the Safavids did enter in conflict with the Ottoman Empire in the Ottoman-Safavid war, forcing it to split its military resources. However, the Turks won the conflicts against Persia and retained their positions. Furthermore, a maritime Holy League under the command of Doria (formed by Charles's kingdoms and all the Italian states) was later defeated at the Battle of Preveza in 1538.

Intending to fight Francis I in French territory, and even inviting him to personal duel, Charles V led a military invasion of Provence in 1536–1537, which ended in complete failure. Paul III offered his mediation to the Emperor and Francis I, and the three rulers met in 1538 at the Congress of Nice, where a truce was agreed. Milan remained under Habsburg control, and the Savoyard state stayed in French hands.

A short-lived truce
The war of 1536-1538 was considered by many a major defeat for Charles V. At a meeting in Aigues-Mortes between the Emperor and the French king, Charles V agreed, for the future, to appoint a son of Francis I as Duke of Milan, a promise he was going to break. Indeed, Charles later secretly invested his own son Philip with the Duchy of Milan. Returning to Spain, the Emperor stayed with his wife Isabella, who fell ill and died in 1539. He was also informed of a revolt in his hometown of Ghent, where the heavy Imperial taxation was contested. He appointed his son Philip as regent in Spain and, after visiting Francis I in Paris, returned to the Burgundian Low Countries, expanded in 1536 to include Groningen and Drenthe. Charles's army of German mercenaries, supported by the Spanish forces of the Duke of Alba, suppressed the insurrection in 1540. Charles humiliated the rebels by parading their leaders in undershirts with hangman nooses around their necks. The emperor was ultimately convinced by Mary of Hungary to show clemency "out of respect to his countrymen" and relaxed the financial burden on the Low Countries.

Meanwhile, due to difficulties encountered by the Pope in organizing a general council to avoid a schism in the Church, the Emperor decided to summon a German religious meeting and presided over the Regensburg talks (1541) between Catholics and Lutherans. No compromise was achieved, largely due to the opposition of Pope Paul III who wanted a general council to take place in Italy. Charles V left Germany and was meeting with Paul III in the Italian city of Lucca, when he was informed of the Ottoman conquest of central Hungary, including Buda and Pest, following the death of Zapolya. Furious, he assembled in Genoa a fleet similar in size to the one that captured Tunis in 1535. From Palma de Majorca, he launched the long-awaited attack on Algiers, the base of Barbarossa, but was forced to return to Minorca after a disastrous campaign (1541).

Last war against Francis I
In the aftermath of these events, two French ambassadors to Constantinople, Antonio Rincon and Cesare Fregoso, were killed by Charles's agents in Italy. A new French-Imperial war thus broke out in 1542. After passing the New Laws to reform the encomienda system, considered brutal by figures such as Bartolomé de las Casas, (a conference in Valladolid, inclusive of de Las Casas, was finally convened in 1550 to debate the morality on the use of force against the Indios) and leaving detailed instructions concerning the government of Spain to his son Philip, Charles V returned in 1543 to the Holy Roman Empire and there remained until the end of his reign. At a meeting in Busseto, he and Paul III agreed on Trent, located halfway between Italy and Germany, as the location of the future ecumenical council.

In alliance with Henry VIII of England, Charles V decided to invade France from Germany via the Low Countries, where Duke William of Cleves was forging an alliance with Francis I. This decision was also supported by the Protestants. At the Diet of Speyer in Germany, Charles V assembled an Imperial army formed by Catholics (German veterans, Spaniards, and Italians, all under the command of Ferrante Gonzaga) and Lutherans (under the command of Maurice of Saxony and the Margrave of Brandeburg) and marched in France, threatening Paris. Out of money, Charles V and Francis I signed the truce of Crépy-en-Laonnois (1544), which included the end of the Franco-Ottoman alliance and reconfirmed the previous peace. Meanwhile, the Emperor annexed Zutphen and Guelders to the Burgundian territories at the conclusion of the Guelders Wars. Duke William of Cleves ultimately surrendered to the Emperor his ambitions and claims over the Low Countries with the Treaty of Venlo.

However, the war with the Ottomans was compromised. Suleiman effectively emerged victorious in the contest for the Mediterranean and central Hungary. To gain himself some respite from the huge expenses of the Turkish wars, Charles was eventually forced to accept a truce in 1545, which became, two years later, the humiliating Treaty of Adrianople. On the other hand, the peace of Crépy allowed Charles V to concentrate his energies on the religious situation in Germany.

Schmalkaldic war
In 1545, the long-awaited ecumenical council was opened by Pope Paul III in the city of Trent, located in Italy but close to Germany. This event, combined with the Burgundian unification of the Low Countries, solemnly declared by the Emperor in Brussels, and with the discovery of the largest American silver mines in Potosí by the Spaniards, meant that Charles V was at the zenith of his power. The Emperor and the catholic League of Nuremberg (formed in 1538) supported the Tridentine summit, but the Protestant Schmalkaldic League refused to recognize the council's validity, arguing that its location and composition were favorable to the Pope, and occupied certain territories of Catholic princes. At a Diet in Worms, the Protestant princes accused the Emperor of betrayal and even questioned his legitimacy to rule. Their propaganda now described him simply as "Charles of Ghent, so-called Emperor of Germany".

Charles V, "having resolved to remain at all costs Emperor of Germany", as he recalled in his autobiography, outlawed the Schmalkaldic League and opened hostilities against it in 1546 (the year of Luther's death). Papal troops under the command of Ottavio Farnese, sent by Paul III "to avenge the sack of Rome", joined the Emperor. The Catholic forces successfully defeated the League's troops. The Emperor, co-ordinating the German regiments of Maurice, Duke of Saxony and the Spanish forces of the Duke of Alba, ultimately captured the two leading Protestant princes, John Frederick, Elector of Saxony and Philip of Hesse, at the Battle of Mühlberg (1547). Charles's decision to imprison them in Brussels exacerbated religious tensions, but effectively ended the civil war.

Aftermath
Meanwhile, the Papal-Imperial collaboration came to an end. Pope Paul III had created the Duchy of Parma and Piacenza, territories at the southern border of the Habsburg Duchy of Milan, and invested his son Pierluigi Farnese with the new state. Milan's new Imperial governor Ferrante Gonzaga resented the papal decision and, with the approval of Charles V, ordered the assassination of Pierluigi Farnese and occupied Piacenza in 1547. Paul's nephew Ottavio Farnese returned to Italy and defended Parma as its new Duke, while the Pope, in response to the Imperial actions, transferred the ecumenical council to Bologna, effectively suspending it. With the Augsburg Interim of 1548, the Emperor created a temporary solution by giving certain allowances to Protestants until a reconvened Council of Trent would restore unity. However, members of both sides resented the Interim and some actively opposed it.

The situation remained tense and Charles V, declining in health, further defined the future distribution of territories between his son Philip of Spain and his brother Ferdinand of Austria. In 1549, he issued a Pragmatic Sanction, declaring the Low Countries to be a unified entity of Seventeen Provinces of which his son Philip would be the heir. To celebrare the event, he and his son made a series of Joyous Entries in several Flemish cities. A year later, Charles V and Ferdinand, along with their sister Mary of Hungary, met at the Augsburg summit and agreed to the following succession plans for the Holy Roman Empire: Ferdinand would succeed Charles as already agreed, Philip would succeed Ferdinand, and Ferdinand's son Maximilian would succeed Philip. To maintain dynastic unity, inter-Habsburg marriages were to be arranged. However, Ferdinand ultimately convinced Philip to renounce his claim to the Imperial succession in favour of Maximilian.

Last battles


The Council of Trent was re-opened by the new Pope, Julius III, in 1550. This time the Lutherans were also represented. Charles V set up the Imperial court in Innsbruck, Austria, sufficiently close to Trent for him to follow the evolution of the debates. Meanwhile, the new French king Henry II established a new alliance with Suleiman the Magnificent. The Ottoman fleet captured Tripolitania from the Knights of Malta (Charles's vassals via the kingdom of Sicily) and simultaneously launched a naval invasion of Corsica, forcing the Imperial admiral Doria to concentrate his forces on recovering the island for Genoa. Henry II also intervened in a new Italian war between the pro-imperial Duchy of Florence and the anti-imperial Republic of Siena, supporting the latter and prolonging the Republic's resistance for a number of years (although Siena was ultimately incorporated in Florentine territories).

By the Treaty of Chambord (1552), the Protestant princes called Henry II of France to occupy the Three Bishoprics (Metz, Verdun, and Toul) and to support them in a second rebellion against Charles V. Maurice of Saxony, instrumental for the Imperial victory in the first conflict, switched sides in favor of the Protestant cause. With a surprising attack, he marched directly into Innsbruck with the goal of capturing the Emperor. Charles V was forced to flee the city during an attack of gout and, carried in a litter, barely made it alive to Villach in a state of semi-consciousness. Subsequently, the Emperor agreed to the Peace of Passau and liberated the Protestant princes captured at Mühlberg. Assisted by the Spanish troops of the Duke of Alba and by the German regiments of the Margrave of Brandeburg, Charles V besieged French-held Metz but failed to recapture it from the forces led by the Duke of Guise and Marshal Montmorency. Inflation was so high that the campaign of 1552 costed as much as the wars between 1521 and 1529. Charles then returned to the Low Countries for a last campaign against the French and for the remaining years of his emperorship. In 1555, he instructed his brother Ferdinand to sign the Peace of Augsburg in his name. The agreements recognized the religious division of Germany between Catholic and Protestant princedoms (Cuius regio, eius religio).

Division of the Habsburgs
Between 1554 and 1556, Charles V gradually divided the Habsburg empire between a Spanish line and a German-Austrian branch. His abdications occurred at the Palace of Coudenberg and are sometimes known as "Abdications of Brussels" (Abdankung von Brüssel in German and Abdicación de Bruselas in Spanish). First he abdicated the thrones of Sicily and Naples, both fiefs of the Papacy, and the Imperial Duchy of Milan, in favour of his son Philip on 25 July 1554. Philip was secretly invested with Milan already in 1540 and again in 1546, but only in 1554 did the Emperor make it public. Upon the abdications of Naples and Sicily, Philip was invested by Pope Julius III with the kingdom of Naples on 2 October and with the Kingdom of Sicily on 18 November.

The most famous—and only public—abdication took place a year later, on 25 October 1555, when Charles announced to the States General of the Netherlands (reunited in the great hall where he was emancipated exactly forty years earlier) his abdication in favour of his son of those territories as well as his intention to step down from all of his positions and retire to a monastery. During the ceremony, the gout-afflicted Emperor Charles V leaned on the shoulder of his advisor William the Silent and, crying, pronounced his resignation speech:



"'When I was nineteen, upon my grandfather's death, I undertook to be a candidate for the Imperial crown, not to increase my possessions but rather to engage myself more vigorously in working for the welfare of Germany and my other realms…and in the hopes of thereby bringing peace among the Christian peoples and uniting their fighting forces for the defense of the Catholic faith against the Turks...I had almost reached my goal, when the attack by the French king and some German princes called me once more to arms. Against my enemies I accomplished what I could, but success in war lies in the hands of God, Who gives victory or takes it away, as He pleases…I must for my part confess that I have often misled myself, either from youthful inexperience, from the pride of mature years, or from some other weakness of human nature. I nonetheless declare to you that I never knowingly or willingly acted unjustly…If actions of this kind are nevertheless justly laid to my account, I formally assure you now that I did them unknowingly and against my own intention. I therefore beg those present today, whom I have offended in this respect, together with those who are absent, to forgive me.'."

In 1556, with no fanfare, Charles V finalized his abdications. On 16 January 1556, he gave Spain and the Spanish Empire in the Americas to Philip. On 3 August 1556, he abdicated as Holy Roman Emperor in favour of his brother Ferdinand, elected King of the Romans in 1531. The succession was recognized by the prince-electors assembled at Frankfurt only in 1558, and by the Pope only in 1559. The Imperial abdication also marked the beginning of Ferdinand's legal and suo jure rule in the Austrian possessions, that he governed in Charles's name since 1521–1522 and were attached to Hungary and Bohemia since 1526.

According to scholars, Charles decided to abdicate for a variety of reasons: the religious division of Germany sanctioned in 1555; the state of Spanish finances, bankrupted by inflation at the end of his reign; the revival of Italian Wars with attacks from Henri II of France; the never-ending advance of the Ottomans in the Mediterranean and central Europe; and his declining health, in particular attacks of gout such as the one that forced him to postpone an attempt to recapture the city of Metz where he was later defeated.

Retirement and burial
In September 1556, Charles left the Low Countries and sailed to Spain accompanied by his sisters, Mary of Hungary and Eleanor of Austria. He arrived at the Monastery of Yuste of Extremadura in 1557. He continued to correspond widely and kept an interest in the situation of the empire, while suffering from severe gout. He lived alone in a secluded monastery, surrounded by paintings by Titian and with clocks lining every wall, which some historians believe were symbols of his reign and his lack of time. In August 1558, Charles was taken seriously ill with what was revealed in the twenty-first century to be malaria. He died in the early hours of the morning on 21 September 1558, at the age of 58, holding in his hand the cross that his wife Isabella had been holding when she died. Following his death, there were a plethora of commemorations in his empire, including in Mexico and Peru. Some 30,000 masses were arranged for the soul of the emperor and some 30,000 gold ducats that he had set aside for the ransom of prisoners, poor virgins, and paupers were distributed, but he owed huge debts from his constant warfare far beyond the funds on hand, which his heirs spent decades paying off.

Charles was originally buried in the chapel of the Monastery of Yuste, but he left a codicil in his last will and testament asking for the establishment of a new religious foundation in which he would be reburied with Isabella. Following his return to Spain in 1559, their son Philip undertook the task of fulfilling his father's wish when he founded the Monastery of San Lorenzo de El Escorial. After the Monastery's Royal Crypt was completed in 1574, the bodies of Charles and Isabella were relocated and re-interred into a small vault in directly underneath the altar of the Royal Chapel, in accordance with Charles's wishes to be buried "half-body under the altar and half-body under the priest's feet" side by side with Isabella. They remained in the Royal Chapel while the famous Basilica of the Monastery and the Royal tombs were still under construction. In 1654, after the Basilica and Royal tombs were finally completed during the reign of their great-grandson Philip IV, the remains of Charles and Isabella were moved into the Royal Pantheon of Kings, which lies directly under the Basilica. On one side of the Basilica are bronze effigies of Charles and Isabella, with effigies of their daughter Maria of Austria and Charles's sisters Eleanor of Austria and Maria of Hungary behind them. Exactly adjacent to them on the opposite side of the Basilica are effigies of their son Philip with three of his wives and their ill-fated grandson Carlos, Prince of Asturias.

administratio and as administrator


Given the vast dominions of the House of Habsburg, Charles was often on the road and needed deputies to govern his realms for the times he was absent from his territories. His first Governor of the Netherlands was Margaret of Austria (succeeded by his sister Mary of Hungary and Emmanuel Philibert, Duke of Savoy). His first Regent of Spain was Adrian of Utrecht (succeeded by Isabella of Portugal and Philip II of Spain). For the regency and governorship of the Austrian hereditary lands, Charles named his brother Ferdinand Archduke in the Austrian lands under his authority at the Diet of Worms (1521). Charles also agreed to favor the election of Ferdinand as King of the Romans in Germany, which took place in 1531. By virtue of these agreements Ferdinand became Holy Roman Emperor and obtained hereditary rights over Austria at the abdication of Charles in 1556. Charles de Lannoy, Carafa and Antonio Folc de Cardona y Enriquez were viceroys of the kingdoms of Naples, Sicily and Sardinia, respectively.

Overall, Charles V travelled ten times to the Low Countries, nine to Germany, seven to Spain, seven to Italy, four to France, two to England, and two to North Africa. During all his travels, the Emperor left a documentary trail in almost every place he went, allowing historians to surmise that he spent 10,000 days in the Low Countries, 6,500 days in Spain, 3,000 days in Germany, and 1,000 days in Italy. He further spent 195 days in France, 99 in North Africa and 44 days in England. For only 260 days his exact location is unrecorded, all of them being days spent at sea travelling between his dominions. As he put it in his last public speech: "my life has been one long journey".

Charles never traveled to his overseas possessions in the Americas, since such a transatlantic crossing to a place not central to his political interests at the time was unthinkable.

"The New World was an increasingly important part of the balance of power, but it was completely subordinate to European considerations. The Spanish colonial empire took up relatively little of Charles V's time. Its principal function was to provide resources to support his ambitions on the near side of the Atlantic: again and again, it was bullion from the Indies - a fifth of total revenue - which either funded campaigns against the French, Turks, and German princes directly, or provided the security against which the Emperor could borrow the great banking house of Fugger in Augsburg. For example, of nearly 2 million escudos' worth of treasury, the largest recipient was Germany, followed by the Low Countries. Charles's travels throughout his reign also show his priority quite clearly: he visited Italy on seven occasions, France on four, and England and Africa on two, and spent six long stays in Spain itself, but he travelled to Flanders and Germany on no fewer than nineteen occasions; he never visited the Americas. His imperial status stemmed from the Imperium Romanum, not the global sweep of his lands. In short, the Holy Roman Empire, not the emerging Spanish empire, provided the Imperial context in which the ambitions of Charles V played out."

- Europe, the Struggle for Supremacy, 1453 to the Present, p.87, Brendan Simms

He did, however, establish strong administrative structures to rule them, including the European-based Council of the Indies in 1524 and the establishment of the Viceroyalty of New Spain and the Viceroyalty of Peru when the Aztec and Inca civilizations were conquered in his name.

Military system


Under the organization and patronage of Maximilian I, Southern Germany had become the leading arms industry region of the 16th century, rivalled only by Northern Italy with the chief centers being Nuremberg, Augsburg, Milan, and Brescia. Charles V continued with the development of mass production (and standardization of gun caliber), which greatly affected warfare.

The Helmschmied of Augsburg and the Negroli of Milan were among the foremost families of armourers of the time. Under Charles V, the Spanish arms industry was also significantly expanded, with significant improvements of the muskets.

The Landsknechte, originally recruited and organized by Maximilian and Georg von Frundsberg, formed the bulk of Charles V's Imperial army. They surpassed the Swiss mercenaries in quality and quantity as the "best and most easily available mercenaries in Europe" and were considered best fighting troops in the first half of the 16th century for their brutal and ruthless efficiency, with a French saying going "a Landsknecht thrown out heaven couldn't get in hell because he would frighten the devil". Terrence McIntosh notes that, Charles V, like his grandfather, "relied heavily on German military manpower, fearsome landsknechts, as well as redoubtable Swiss-German mercenaries. Maximilian invaded northern Italy in 1496, 1508, and repeatedly between 1509 and 1516. Soon after the Imperial election in 1519, Charles V was waging war there. His overwhelmingly German troops won the Battle of Pavia and captured the French king in 1525; two years later they sacked the city of Rome, murdering between six and twelve thousand residents and pillaging for eight months."

His expansionist and aggressive policy, in combination with brutal behaviours of the Landsknechte, which incidentally happened right at the formation of the early modern German nation, would leave an indelible mark on the neighbours' impression of the German polity, despite the fact that in the long term, it was in general not belligerent.

Charles V also favoured German heavy cavalry, although costly. Many cavalrymen and noblemen fighting for Charles V were of Burgundian extraction, often part of the Order of the Golden Fleece. Italian condottieri were also recruited.

In Spain, inheriting the reform work of Gonzalo Fernández de Córdoba, in 1536, Charles reorganized his infantry and created the first units of the tercios.

Later they would become "the most formidable fighting force of the sixteenth century". The original tercios were exclusively Spanish and this situation remained until Philip II organized the Italian tercios in 1584.

Finance


Charles's main sources of revenue were from Castile, Naples and the Low Countries, which yielded in total an annual amount of around 2.8 million Spanish ducats in the 1520s and about 4.8 million Spanish ducats in the 1540s. Ferdinand I's annual revenue totalled between 1.7 million and 1.9 million Venetian ducats (2.15–2.5 million florin or Rhine gulden). Their chief enemy, the Ottomans, had a more streamlined and profitable system, yielding in total 10 million gold ducats in 1527–1528 and also did not suffer from deficit.

He often had to depend on loans from bankers. He borrowed 28 million ducats in total during his reign, of which 5.5 million ducats came from the Fuggers and 4.2 million from the Welsers of Augsburg. Other creditors were from Genoa, Antwerp and Spain.

Communication, diplomatic, and espionage systems
The Habsburg expansion and consolidation of rule was accompanied by remarkable development of communication, diplomatic and espionage systems. In 1495, Emperor Maximilian and Franz von Taxis (from the Thurn und Taxis family) developed the Niederländische Postkurs, a postal system that connected the Low Countries with Innsbruck. The system quickly converged with the European trade system and an emerging market for news, spurring a pan-Europe communication revolution

The system was developed further by Philip the Handsome, who negotiated new standards for the systems with the Taxis, and unified communication between Germany, the Netherlands, France and Spain by adding stations in Granada, Toledo, Blois, Paris and Lyon in 1505.

After his father's death, Charles, as Duke of Burgundy, continued to develop the system. Behringer notes that, "Whereas the status of private mail remains unclear in the treaty of 1506, it is obvious from the contract of 1516 that the Taxis company had the right to carry mail and keep the profit as long as it guaranteed the delivery of court mail at clearly defined speeds, regulated by time sheets to be filled in by the post riders on the way to their destination. In return, imperial privileges guaranteed exemption from local taxes, local jurisdiction, and military service. 21 The terminology of the early modern communications system and the legal status of its participants were invented at these negotiations." He confirmed Jannetto's son Giovanni Battista as Postmaster General (chief et maistre general de noz postes par tous noz royaumes, pays, et seigneuries) in m1520. By Charles V's time, "the Holy Roman Empire had become the centre of the European communication(s) universe."

Charles V also inherited efficient multinational diplomatic networks from both the Trastámara and Habsburg-Burgundian dynasties. Following the example of the papal curia, in the late fifteenth century, both dynasties also began to employ permanent envoys (earlier than other secular powers). The Habsburg network developed in parallel to their postal system. Charles V combined the Spanish and the Imperial systems into one.

His opponents, chiefly France, found a counterweight though, by the alliance with the Ottoman Empire, which Francis I admitted to be the only force that could prevent the Habsburgs from transforming European states into a Europe-wide empire. Moreover, Charles V's military might frightened other European rulers, thus while he was able to make the pope a reluctant agent like his grandfather Ferdinand had done, no lasting alliance could be achieved. After the Battle of Pavia, the European rulers united to prevent harsh terms from being placed upon France.

In the 1530s, in the context of the conflict between the Habsburg empire and their greatest opponent, the Ottomans, an espionage network was built by Charles and Don Alfonso Granai Castriota, the marquis of Atripalda, who conducted its operations. Naples became the main rearguard of the system. Gennaro Varriale writes that, "on the eve of the Tunis campaign, Emperor Charles V possessed a network of spies based in the Kingdom of Naples that watched over all the corners of the Ottoman Empire."

Patronage of the arts and architecture
Several notable men were recognized with patronage by Charles. Noted Spanish poet Garcilaso de la Vega, a nobleman and ambassador in the Imperial court of Charles, was first appointed contino (imperial guard) of the emperor in 1520. Alfonso de Valdés, twin brother of the humanist Juan de Valdés and secretary of the emperor, was a Spanish humanist. Peter Martyr d'Anghiera, an Italian historian at the service of Spain, wrote the first accounts of explorations in Central and South America in a series of letters and reports, grouped in the original Latin publications of 1511 to 1530 into sets of ten chapters called "decades". His Decades are of great value in the history of geography and discovery. His De Orbe Novo (On the New World, 1530) describes the first contacts of Europeans and Native Americans, Native American civilizations in the Caribbean and North America, as well as Mesoamerica, and includes, for example, the first European reference to India rubber.

Martyr was given the post of chronicler (cronista) in the newly formed Council of the Indies (1524), commissioned by Charles V to describe what was occurring in the explorations of the New World. In 1523 Charles gave him the title of Count Palatine, and in 1524 called him once more into the Council of the Indies. Martyr was invested by Pope Clement VII, as proposed by Charles V, as Abbot of Jamaica. Juan Boscán Almogáver was a poet who participated with Garcilaso de la Vega in giving naval assistance to the Isle of Rhodes during a Turkish invasion. Boscà fought against the Turks again in 1532 with Álvarez de Toledo and Charles in Vienna. During this period, Boscán had made serious progress in his mastery of verse in the Italian style.

Charles commissioned several portraits from the painter Titian, including the Portrait of Charles V and the Equestrian Portrait of Charles V, becoming a friend of the artist. These portraits helped to spread the image of Charles as a powerful ruler and protector of Christendom, promoting his image as an enlightened Renaissance ruler.

The building of the Palace of Charles V was commissioned Charles, who wished to establish his residence close to the Alhambra palaces. Although the Catholic Monarchs had already altered some rooms of the Alhambra after the conquest of the city in 1492, Charles V intended to construct a permanent residence befitting an emperor. The project was given to Pedro Machuca, an architect whose life and development are poorly documented. At the time, Spanish architecture was immersed in the Plateresque style, with traces of Gothic architecture still visible. Machuca built a palace corresponding stylistically to Mannerism, a mode then in its infancy in Italy. The exterior of the building uses a typically Renaissance combination of rustication on the lower level and ashlar on the upper. The building has never been a home to a monarch and stood roofless until 1957.

Americas


From his maternal grandmother, Isabella I of Castile, who had funded Christopher Columbus's first voyage in 1492, Charles inherited Castile's overseas territories in the Americas. Spanish colonization of the Americas began in 1493, but these permanent settlements in the Caribbean and Spanish Main were marginal to Charles's European empire and not the focus of his attention. Through the Treaty of Tordesillas (1494), Spain and Portugal had agreed on a division of overseas territories, so that with the exception of Brazil, which Portugal could claim, Charles could claim the rest of the New World. The realm of his known possessions expanded with the Spanish conquest of the Aztec Empire (1519–21) under conquistador Hernán Cortés and by Magellan's circumnavigation of the globe in 1522. These successes convinced Charles of his divine mission to become the leader of Christendom, which still perceived a significant threat from Islam. The conquest of central Mexico, bringing a high indigenous civilization under Spanish rule, compelled Charles to grapple with creating structures of institutional rule in the Americas. Charles had begun creating councils to oversee aspects of his realms, first reorganizing the existing Council of Castile, established by the Catholic Monarchs. Indicating the Americas' importance, he founded the Council of the Indies in 1524 to deal with the complexities of Castile's overseas possessions. Unlike his European possessions that were not consolidated geographically but were nonetheless all relatively near each other, ruling the Americas had to take into account the Atlantic Ocean. Prior to the creation of the viceroyalties, he established a high court audiencia to administer justice. He formalized conversion of indigenous populations to Christianity, the so-called "spiritual conquest", by sending Franciscan, Dominican, and Augustinian friars starting in the mid-1520s. With the discovery of large deposits of silver in northern Mexico in the 1540s and in 1545 in Peru at Potosí, Charles's advisors urged regulation of mining to ensure that bullion was directed to crown coffers. Ad hoc administrative solutions of the early conquest period gave way to Charles's establishment of the Viceroyalty of New Spain in Mexico City (1535), the Spanish capital founded on the ruins of the Aztec capital of Tenochtitlan. After the Spanish conquest of the Inca Empire in the 1530s, Charles established the Viceroyalty of Peru in the newly founded Spanish capital of Lima (1544). As it became clear that establishing royal control was important, Charles sought to undermine growing power of the group of conquistadors in Mexico and Peru, awarded personal grants of indigenous labor in perpetuity, by issuing the New Laws of 1542, ending grant holders' rights in perpetuity. Dominican friar Bartolomé de las Casas's long term campaign to protect indigenous populations from Spanish conquerors' exploitation influenced Charles's new policy. In Peru, it resulted in a major Spanish rebellion against the crown when the newly appointed viceroy, Blasco Núñez Vela, attempted to implement the measure. In Mexico, Viceroy don Antonio de Mendoza prudently did not. In Peru, the new viceroy was murdered. "To many Spanish settlers the New Laws seemed like a declaration of war, and their hostile reaction was swift and overwhelming." The violent uprising necessitated a major military response, organized by Pedro de la Gasca, to whom Charles granted sweeping powers in order to re-establish royal authority. The rebellion in Peru coincided with one in Germany. In the Americas, Charles was forced to temper the initial order ending inheritance, allowing grants to be passed on to one further generation, but he refused to yield on the question of allowing enslavement of the indigenous. Regarding the Spanish rebels supporting the cause of Gonzalo Pizarro, who might have set up a kingdom of Peru with himself as ruler, Charles fully supported Pizarro's beheading and his supporters' execution and confiscation of property. This was similar to the treatment of comunero rebels early in his Iberian rule. Pizarro's execution marks the end of Spanish rebellion against the crown. Relatively early in his rule, Charles assigned a concession (1528) in Venezuela Province to Bartholomeus V. Welser, in compensation for his inability to repay debts owed. The concession, known as Klein-Venedig (little Venice), was revoked in 1546 during the rebellion in Peru by Spanish colonists against Charles.

The question of labor and treatment of indigenous populations had occupied Charles's maternal grandparents, and as indigenous populations in the Caribbean were decimated by disease and overwork, transshipment of African slaves to replace the labor force began. On 28 August 1518, Charles issued a charter authorizing the transportation of slaves directly from Africa to the Americas. Up until that point (since at least 1510), African slaves had usually been transported to Castile or Portugal and had then been transshipped to the Caribbean. Charles's decision to create a direct, more economically viable Africa to America slave trade fundamentally changed the nature and scale of the transatlantic slave trade.

Protection of indigenous populations against Spaniards' exploitation was the key motivation behind Charles's issuance of the 1542 New Laws. With Gasca's suppression of Spanish colonists' rebellion in Peru, Charles was still concerned about the welfare of his indigenous subjects. So, on July 3, 1549, Charles ordered the Council of the Indies to stop all the conquests until it was certain that Spain was acting in accordance with the moral law, so penetration into the American continent was suspended until 1556. This was because philosophical questions arose, especially from Catholic jurists and scholastic philosophers, about whether the Hispanic Monarchy had the moral right to legally conquer the Indies. Since the year 1542, a moral crisis was developing in the government because of the Spanish colonization in America, while the Crown of Castile was overwhelmed by the constant denunciations of abuses it was receiving, especially from the conquests in Peru and those that occurred in the New Kingdom of Granada, which would cause anguish in people of all Estates, even if they are prelates or knights of the Spanish Nobility. Thus, Charles, influenced by the reflections of Francisco de Vitoria and the School of Salamanca, together with the pressure of missionaries, wanted to be sure that their power was beyond reproach. Therefore, it was ordered to stop all military companies in the overseas domains until a board of wise men ruled on the fairest way to carry them out, seriously considering the total or partial abandonment of the New World until the imperial doubt was resolved, regarding how to avoid in the future the possibility of abusive discoveries, overwhelming conquests and predatory colonizations that were based on the oppressive exploitation of indigenous labor. So, in 1550, Charles convened a conference at Valladolid in order to consider the morality of the force used against the indigenous populations of the New World, which included figures such as Bartolomé de las Casas, from which conceptions of the human rights of the Indians would arise according to the Thomistic natural law, being the Hispanic Monarchy a pioneer, both in theory and in practice, on how to approach respect for the conquered. Theologians and jurists from all parts of the empire began to arrive in the capital, presenting themselves with the best souls of Spain, such as Domingo de Soto, Bartolomé de Carranza, Melchor Cano, and also Pedro de la Gasca (Peru's first peacemaker after Civil Wars between the conquerors of Peru) together with the jurisconsults of the Council of the Indies. Bartolomé de las Casas would defend that the wars of conquest were unjust, while Juan Ginés de Sepúlveda would defend the opposite. The court, after long debates, voted and tied, so there was no official sentence, but there were several binding reports in which the purpose was to ensure that the treatment given to the natives was correct. It was the first time that kings and philosophers coincided that men have fundamental rights for the mere fact of being men (Ius gentium), rights of the eternal Law that are prior to any positive law written in the treaties. Never before had a European people wondered in such depth where their own rights of the victor ended, and where the rights of the defeated begin.

Finally, Spain did not abandon the Indies, largely based on the sayings of Vitoria: ''"After many barbarians have converted there, it would not be convenient or lawful for the prince to abandon the administration of those provinces." '' Therefore, Spanish rule was maintained as Sepúlveda claimed, but it was recognized that the Indians were people with their own rights as de las Casas paid for and enshrined in the New Laws, together with the papal bull Sublimis Deus. Given this, there was no longer talks about conquest, but about pacification, so urbanization was resumed, with specific instructions to avoid harm to the Indians. The regulations on how to act in the future, in terms of discoveries and colonizations, were the following:

"-In the discoveries: They would be made with a license from the Audiencia and carrying at least one religious designated by it. On these trips it was forbidden to steal the goods from the natives and take them by force, except for some of them who wanted to go as interpreters. No Viceroy or Governor would undertake new voyages of discovery on their own. Neither by sea nor by land.

-In the colonizations: parcels would be prohibited from the first life; Indian slaves would be freed (it was forbidden to make them slaves in the future); a revision of the repartimientos de indios (to the Audiencias) would be ordered so that those that some Spaniards had in excess would pass to the Crown; All the Indians that private individuals had without legitimate title would be transferred to the Crown; it would be forbidden to charge the natives (except where it was inexcusable); moderate rates would be imposed on taxes and services; Rates and tributes would be completely abolished in those places where the Indians had been subjected to fierce exploitation (The Antilles)."

Education
His father's sister Margaret was the mother figure in his life. She was a huge influence on Charles. A canny, learned, and artistic woman, with a court that included artists Bernard van Orley and Albrecht Dürer and master tapestry-maker Pieter van Aelst, she taught her nephew "above all that a court could be a salon." She saw to his education, securing as tutor Adrian of Utrecht, a member of the Brethren of the Common Life, which advocated simplicity and promoted a cult of indigence and deprivation. The Brethren had many important members, including Thomas à Kempis. Adrian later became Pope Adrian VI. A third major influence in Charles's early life was William de Croÿ, Sieur de Chièves, who became his "governor and grand chamberlain", giving Charles a chivalrous education. He was tough taskmaster, and when questioned about it he said "Cousin, I am the defender and guardian of his youth. I do not want him to be incapable because he has not understood affairs nor been trained to work."

Languages
Charles spoke several languages. He was fluent in French and Dutch, his native languages. He later added an acceptable Castilian Spanish, which he was required to learn by the Castilian Cortes Generales. He could also speak some Basque, acquired by the influence of the Basque secretaries serving in the royal court. He gained a decent command of German following the Imperial election, though he never spoke it as well as French. By 1532, Charles was proficient in Portuguese, and spoke Latin. A witticism sometimes attributed to Charles is: "I speak Spanish/Latin (depending on the source) to God, Italian to women, French to men and German to my horse." A variant of the quote is attributed to him by Jonathan Swift in his 1726 Gulliver's Travels, but there are no contemporary accounts referencing the quotation (which has many other variants) and it is often attributed instead to Frederick the Great.

Appearance and health
Charles suffered from an enlarged lower jaw (mandibular prognathism), a congenital deformity that became considerably worse in later Habsburg generations, giving rise to the term Habsburg jaw. This deformity may have been caused by the family's long history of repeated intermarriages between close family members, as commonly practiced in royal families of that era to maintain dynastic control of territory.

Some advisors considered him physically weak and used that as a reason for him to delay his marriage to Mary Tudor. A diplomat in Charles's court described him as "not much of a womaniser" and did not have out of wedlock children during his marriage. He suffered from fainting spells, which might have been epilepsy. He was seriously afflicted with gout, presumably caused by a diet consisting mainly of red meat.

As he aged, his gout progressed from painful to crippling. In his retirement, he was carried around the Monastery of Yuste in a sedan chair. A ramp was specially constructed to allow him easy access to his rooms.

Marriage
On 21 December 1507, Charles was betrothed to 11-year-old Mary, the daughter of King Henry VII of England and younger sister to the future King Henry VIII of England, who was to take the throne in two years. However, the engagement was called off in 1513, on the advice of Cardinal Thomas Wolsey, and Mary was instead married to King Louis XII of France in 1514.

After his ascension to the Spanish thrones of Castile and Aragon, negotiations for Charles's marriage began shortly after his arrival in Castile, with the Castilian nobles expressing their wishes for him to marry his first cousin Isabella of Portugal, the daughter of King Manuel I of Portugal and Charles's aunt Maria of Aragon. The nobles desired Charles's marriage to a princess of Castilian blood, and a marriage to Isabella would have secured an alliance between Castile and Portugal. However, the 18-year-old King was in no hurry to marry and ignored the nobles' advice, exploring other marriage options. Instead of marrying Isabella, he sent his sister Eleanor to marry Isabella's widowed father, King Manuel, in 1518.

In 1521, on the advice of his Flemish counsellors, especially William de Croÿ, Charles became engaged to his other first cousin, Mary, daughter of his aunt, Catherine of Aragon, and King Henry VIII, in order to secure an alliance with England. However, this engagement was very problematic because Mary was only 6 years old at the time, sixteen years Charles's junior, which meant that he would have to wait for her to be old enough to marry.

By 1525, Charles could not wait any longer to marry and have legitimate children as heirs. He had abandoned the idea of an English alliance, cancelled his engagement to Mary and decided to marry Isabella and form an alliance with Portugal. He wrote to Isabella's brother, King John III of Portugal, making a double marriage contract – Charles would marry Isabella and John would marry Charles's youngest sister, Catherine. A marriage to Isabella was more beneficial for Charles, as she was closer to him in age, was fluent in Spanish and provided him with a very handsome dowry of 900,000 doblas de oro castellanas would help to solve the financial problems brought on by the Italian Wars. The marriage brought him the additional titles as "monarch of the Canaries [Canary Islands] and of the [Portuguese] Indies, the isles of mainland, and the Ocean Sea." Marrying Isabella would allow Charles to have her serve as regent in Spain whenever he left. Ultimately this union would result in their son Philip having the strongest claim to the Portuguese throne when the House of Aviz died out in 1580, resulting in the Iberian Union.

On 10 March 1526, Charles and Isabella met at the Alcázar of Seville. The marriage was originally a political arrangement, but on their first meeting, the couple fell deeply in love: Isabella captivated the Emperor with her beauty and charm. They were married that very same night in a quiet ceremony in the Hall of Ambassadors, just after midnight. Following their wedding, Charles and Isabella spent a long and happy honeymoon at the Alhambra in Granada. Charles began the construction of the Palace of Charles V in 1527, wishing to establish a permanent residence befitting an emperor and empress in the Alhambra palaces. However, the palace was not completed during their lifetimes and remained roofless until the late 20th century.

Despite the Emperor's long absences due to political affairs abroad, the marriage was a happy one, as both partners were always devoted and faithful to each other. The Empress acted as regent of Spain during her husband's absences, and she proved herself to be a good politician and ruler, thoroughly impressing the Emperor with many of her political accomplishments and decisions.

The marriage lasted for 13 years until Isabella's death in 1539. The Empress contracted a fever during the third month of her seventh pregnancy, which resulted in antenatal complications that caused her to miscarry a stillborn son. Her health further deteriorated due to an infection, and she died two weeks later on 1 May 1539, aged 35. Charles was left so grief-stricken by his wife's death that for two months he shut himself up in a monastery, where he prayed and mourned for her in solitude. Charles never recovered from Isabella's death, dressing in black for the rest of his life to show his eternal mourning, and, unlike most kings of the time, he never remarried. In memory of his wife, the Emperor commissioned the painter Titian to paint several posthumous portraits of Isabella; the finished portraits included Titian's Portrait of Isabella of Portugal and La Gloria. Charles kept these paintings with him whenever he travelled, and they were among those that he brought with him after his retirement to the Monastery of Yuste in 1557. In 1540, Charles paid tribute to Isabella's memory when he commissioned the Flemish composer Thomas Crecquillon to compose new music as a memorial to her. Crecquillon composed his Missa 'Mort m'a privé in memory of the Empress. It expresses the Emperor's grief and great wish for a heavenly reunion with his beloved wife.

During his lifetime, Charles V had several nonmarital liaisons, including some that produced children. One relationship was with his step-grandmother, Germaine de Foix, which may have produced a child, Isabel. After the death of his wife, Charles "seduced Barbara Blomberg, a teenager exactly the same age as his son Philip." He kept the relationship and the existence of this out-of-wedlock son secret, "no doubt because he felt ashamed of his affair with a teenager when he was forty-six." The child named Gerónimo, later became known as John of Austria; the emperor made provisions for the child in a secret codicil to his will. As with his other out-of-wedlock children, the baby was taken from the mother. He met this son once. The relationship was not revealed to his legitimate children in his lifetime, but they became aware of the relationship after his death.

Issue
Charles and Isabella had seven legitimate children, but only three of them survived to adulthood. Charles also had natural children before he married and after he was widowed.

Due to Philip II being a grandson of Manuel I of Portugal through his mother he was in the line of succession to the throne of Portugal, and claimed it after his uncle's death (Henry, the Cardinal-King, in 1580), thus establishing the personal union between Spain and Portugal.

Charles also had five children out of wedlock:


 * Infanta Isabella of Castile (20 August 1518 – 1537), perhaps daughter of Charles's maternal step-grandmother, Germaine of Foix, but strongly disputed by biographer Geoffrey Parker; Isabella died at the age of 19, never married, and had no issue.
 * Margaret of Austria (1522–1586), daughter of Johanna Maria van der Gheynst, who Charles recognized a servant of Charles I de Lalaing, Seigneur de Montigny, daughter of Gilles Johann van der Gheynst and wife Johanna van der Caye van Cocamby. Married firstly with Alessandro de' Medici, Duke of Florence, and secondly with Ottavio Farnese, Duke of Parma.
 * Joanna of Austria (1522–1530), daughter of Catalina de Rebolledo (or de Xériga), lady-in-waiting of Queen Joanna I of Castile and Aragon or attached to the household of Henry of Nassau. She was brought up in an Augustinian convent in Madrigal de las Altas Torres.
 * Tadea of Austria (1523? – c. 1562), daughter of Orsolina della Penna. Married to Sinibaldo di Copeschi.
 * John of Austria (1547–1578), victor of the Battle of Lepanto, son of Barbara Blomberg.

Titles and Coat of Arms
Charles V styled himself as Holy Roman Emperor after his election, according to a Papal dispensation conferred to the Habsburg family by Pope Julius II in 1508 and confirmed in 1519 to the prince-electors by the legates of Pope Leo X. Although Papal coronation was not necessary to confirm the Imperial title, Charles V was crowned in the city of Bologna by Pope Clement VII in the medieval fashion.

Charles V accumulated a large number of titles due to his vast inheritance of Burgundian, Spanish, and Austrian realms. Following the Pacts of Worms (21 April 1521) and Brussels (7 February 1522), he secretly gave the Austrian lands to his younger brother Ferdinand and elevated him to the status of Archduke. Nevertheless, according to the agreements, Charles continued to style himself as Archduke of Austria and maintained that Ferdinand acted as his vassal and vicar. Furthermore, the pacts of 1521–1522 imposed restrictions on the governorship and regency of Ferdinand. For example, all of Ferdinand's letters to Charles V were signed "your obedient brother and servant". Nonetheless, the same agreements promised Ferdinand the designation as future emperor and the transfer of hereditary rights over Austria at the imperial succession.

Following the death of Louis II, King of Hungary and Bohemia, at the Battle of Mohacs in 1526, Charles V favoured the election of Ferdinand as King of Hungary (and Croatia and Dalmatia) and Bohemia. Despite this, Charles also styled himself as King of Hungary and Bohemia and retained this titular use in official acts (such as his testament) as in the case of the Austrian lands. As a consequence, cartographers and historians have described those kingdoms both as realms of Charles V and as possessions of Ferdinand, not without confusion. Others, such as the Venetian envoys, reported that the states of Ferdinand were "all held in common with the Emperor".

Therefore, although he had agreed on the future division of the dynasty between Ferdinand and Philip II of Spain, during his own reign Charles V conceived the existence of a single "House of Austria" of which he was the sole head. In the abdications of 1554–1556, Charles left his personal possessions to Philip II and the Imperial title to Ferdinand. The titles of King of Hungary, of Dalmatia, Croatia, etc., were also nominally left to the Spanish line (in particular to Don Carlos, Prince of Asturias and son of Philip II). However, Charles's Imperial abdication marked the beginning of Ferdinand's suo jure rule in Austria and his other lands: despite the claims of Philip and his descendants, Hungary and Bohemia were left under the nominal and substantial rule of Ferdinand and his successors. Formal disputes between the two lines over Hungary and Bohemia were to be solved with the Onate treaty of 1617.

Charles's full titulature went as follows:

Charles, by the grace of God, Emperor of the Romans, forever August, King in (of) Germany, King of Italy, King of all Spains, of Castile, Aragon, León, of Hungary, of Dalmatia, of Croatia, Navarra, Grenada, Toledo, Valencia, Galicia, Majorca, Sevilla, Cordova, Murcia, Jaén, Algarves, Algeciras, Gibraltar, the Canary Islands, King of both Hither and Ultra Sicily, of Sardinia, Corsica, King of Jerusalem, King of the Indies, of the Islands and Mainland of the Ocean Sea, Archduke of Austria, Duke of Burgundy, Brabant, Lorraine, Styria, Carinthia, Carniola, Limburg, Luxembourg, Gelderland, Neopatria, Württemberg, Landgrave of Alsace, Prince of Swabia, Asturia and Catalonia, Count of Flanders, Habsburg, Tyrol, Gorizia, Barcelona, Artois, Burgundy Palatine, Hainaut, Holland, Seeland, Ferrette, Kyburg, Namur, Roussillon, Cerdagne, Drenthe, Zutphen, Margrave of the Holy Roman Empire, Burgau, Oristano and Gociano, Lord of Frisia, the Wendish March, Pordenone, Biscay, Molin, Salins, Tripoli and Mechelen.

Below is the Coat of arms of Charles V according to the description: Arms of Charles added to those of Castile, Leon, Aragon, Two Sicilies and Granada present in the previous coat, those of Austria, ancient Burgundy, modern Burgundy, Brabant, Flanders and Tyrol. Charles I also incorporates the pillars of Hercules with the inscription "Plus Ultra", representing the overseas Spanish empire and surrounding coat with the collar of the Golden Fleece, as sovereign of the Order ringing the shield with the imperial crown and Acola double-headed eagle of the Holy Roman Empire and behind it the Cross of Burgundy. From 1520 added to the corresponding quarter to Aragon and Sicily, one in which the arms of Jerusalem, Naples and Navarre are incorporated.