1089

Year 1089 (MLXXXIX) was a common year starting on Monday (link will display the full calendar) of the Julian calendar.

Europe

 * King Demetrius Zvonimir of Croatia dies after a 12-year reign, and is succeeded by Stephen II. Zvonimir's widow, Queen Helena, plots the inheritance of the Croatian crown for her brother, King Ladislaus I of Hungary.
 * June 24 – Viscount Gaston IV of Béarn (supported by French crusaders) reconquers the Aragonese city of Monzón, from Emir Al-Mustain II of the Taifa of Zaragoza.
 * August 18 – Emperor Henry IV marries Eupraxia (daughter of Grand Prince Vsevolod I) at Cologne. She is crowned and assumes the name Adelaide (or Adelheid).
 * King George II abdicates the throne in favour of his 16-year-old son David IV (the Builder) who becomes ruler of Georgia (until 1125).

England

 * Northumbria is divided by King William II into the counties of Northumberland, County Palatine of Durham, Yorkshire, Westmorland and Lancashire.
 * August 11 – A powerful earthquake is recorded in England.

Religion

 * March 21 – Cîteaux Abbey, the first Cistercian monastery, is established by a group of French monks under Robert of Molesme in southern France.
 * September
 * The Synod of Melfi, led by Pope Urban II (his first papal council), issues decrees against simony and clerical marriage.
 * A church council, held in Constantinople, discuses relations between Eastern and Western Christianity.


 * August 28 - The Cathedral of Braga finishes its reconstruction, after 353 years of Muslim occupation, and is consecrated to Saint Mary.

Births

 * Abraham ibn Ezra, Jewish rabbi and philosopher (d. 1167)
 * Berthold of Zwiefalten, German abbot and writer (d. 1169)
 * Dahui Zonggao, Chinese Zen Buddhist monk (d. 1163)
 * Han Shizhong, Chinese general (Song Dynasty) (d. 1151)
 * Mahsati, Persian female poet and writer (approximate date)
 * Richard de Luci, Norman High Sheriff of Essex (d. 1179)
 * Sigurd I (the Crusader), king of Norway (d. 1130)
 * Wulgrin II, count of Angoulême (approximate date)

Deaths

 * May 24 – Lanfranc, archbishop of Canterbury
 * May 29/30 – Mah-i Mulk Khatun wife of caliph al-Muqtadi (r. 1075–1094).
 * May 31 – Sigwin of Are, archbishop of Cologne
 * October 6 – Adalbero, bishop of Würzburg
 * November 11 – Peter Igneus, Italian cardinal-bishop
 * December 22 – William the Walloon, French abbot
 * Agnes of Aquitaine, Italian countess of Savoy
 * Demetrius Zvonimir, king of Croatia and Dalmatia
 * Donnchad mac Domnaill Remair, king of Dublin
 * Durandus of Troarn, French monk and theologian
 * Isaac ibn Ghiyyat, Jewish rabbi and philosopher
 * Mieszko Bolesławowic, Polish prince of Kraków
 * Renauld II, French count of Nevers and Auxerre
 * Theobold III (or Thibaut), French nobleman