1337

Year 1337 (MCCCXXXVII) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar.

January–December

 * March 16 – Edward, the Black Prince establishes the Duchy of Cornwall, becoming the first English Duke.
 * May 24 – Philip VI of France confiscates Gascony from English control.
 * August – Second War of Scottish Independence: English forces relieve Stirling Castle, ending Edward III of England's last campaign in Scotland.
 * October – Hundred Years' War: Edward III of England formally rejects Philip VI's claim to the French throne, initiating hostilities between France and England.
 * November – Battle of Cadzand: English troops raid the Flemish island of Cadzand.

Date unknown

 * Bisham Priory is founded in England.
 * The Scaligeri Family loses control of Padua; Alberto della Scala, patron of the music of the Trecento, moves to Verona.
 * Petrarch, "father" of Renaissance humanism, first visits Rome to wander its mysterious ruins, with an eye for aesthetics as well as for history, exciting a renewed interest in Classical civilisation.
 * The Sofia Psalter is produced in Bulgaria.
 * The famine in China, which had lasted since 1332 and killed 6,000,000, comes to an end.
 * Siege of Nicomedia After its foundation by Osman I in about 1299, the Ottoman Empire expanded across Bithynia in north-west Anatolia by capturing territory from the Byzantine Empire.

Births

 * February 25 – Wenceslaus I, Duke of Luxembourg, Czech Duke of Luxembourg (d. 1383)
 * date unknown
 * Louis II, Duke of Bourbon (d. 1410)
 * Jean Froissart, historian and courtier from Hainaut (d. 1405)
 * Bianca of Savoy, lady consort of Milan (d. 1387)
 * Chŏng Mong-ju, Goryeo diplomat and poet (d. 1392)
 * Robert III of Scotland, second monarch from the House of Stewart to rule Scotland (d. 1406)

Deaths

 * January 8 – Giotto di Bondone, Italian painter (b. 1267)
 * June 7 – William I, Count of Hainaut (b. 1286)
 * June 15 – Angelo da Clareno, Italian Franciscan and leader of a group of Fraticelli (b. 1247)
 * June 25 – Frederick III of Sicily (b. 1272)
 * June 30 – Eleanor de Clare, politically active English noble (b. 1290)
 * date unknown
 * Changshi, khan of the Chagatai Khanate
 * William Frangipani, Latin Archbishop of Patras
 * Musa I of Mali, ruler of the Malian Empire (b. c.1280)
 * Prince Narinaga, Japanese Shōgun (b. 1326, d. either 1337 or 1344, the sources are contradictory)