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

Events

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By place

Europe

• April 20 (possible date) Demetrius Zvonimir, king of Croatia, dies after a 12-year reign, and is succeeded by Stephen II. Zvonimir's widow, Helena of Hungary, Queen of Croatia, plots the inheritance of the Croatian crown for her brother, King Ladislaus I of Hungary.

• June 24 Reconquista: 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 Henry IV, Holy Roman Emperor, marries Eupraxia of Kiev (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

• August 11 A powerful earthquake is recorded in England.

• Northumbria is divided by King William II into the counties of Northumberland, County Palatine of Durham, Yorkshire, Westmorland and Lancashire.

By topic

Religion

• March 21 Cîteaux Abbey, the first Cistercian monastery, is established by a group of French monks under Robert of Molesme in southern France.

• August 28 Braga Cathedral in the County of Portugal has its reconstruction (following 353 years of Muslim occupation) completed sufficiently for its consecration to the Virgin Mary to take place.

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.</onlyinclude>

Births

• Abraham ibn Ezra, Jewish rabbi and philosopher (d. 1167) (approximate date)

• Berthold of Zwiefalten, German abbot and writer (d. 1169) (approximate date)

• Dahui Zonggao, Chinese Zen Buddhist monk (d. 1163)

• Han Shizhong, Chinese general of the Northern Song dynasty (d. 1151)

• Mahsati, Persian female poet and writer (approximate date)

• Richard de Luci, Norman High Sheriff of Essex (d. 1179)

• Sigurd the Crusader, king of Norway (d. 1130)

• Wulgrin II, count of Angoulême (approximate date)

Deaths

• April 20 (possible date) Demetrius Zvonimir, king of Croatia and Dalmatia

• May 24 Lanfranc, Italian-born archbishop of Canterbury

• May 29/30 Mah-i Mulk Khatun wife of caliph al-Muqtadi (r. 1075–1094).

• May 31 Sigwin von Are, archbishop of Cologne

• October 6 Adalbero, Prince-Bishop of Würzburg

• November 11 Peter Igneus, Italian cardinal-bishop

• December 22 William the Walloon, French abbot

• Agnes of Aquitaine, French-born countess consort of Savoy

• Donnchad mac Domnaill Remair, Irish king of Dublin, killed (approximate date)

• Durandus of Troarn, French monk and theologian

• Isaac ibn Ghiyyat, Spanish Jewish rabbi and philosopher

• Mieszko Bolesławowic, Polish prince of Kraków

• Renauld II, French count of Nevers and Auxerre

• Theobald III of Blois (or Thibaut), French nobleman

References