1087

By place

Europe

• Summer – The Taifa of Valencia falls under the domination of El Cid. He stabilizes the region around Valencia, which has revolted against the Moorish puppet ruler Al-Qadir.
• Inge the Elder returns to Svealand and kills his brother-in-law Blot-Sweyn after a 3-year reign. Inge again proclaims himself king of Sweden (approximate date).

England

• September 9 – William the Conqueror dies in Rouen after a fall from his horse. He is succeeded as king of England by his third son William II.
• A fire in London destroys much of the city, including St. Paul's Cathedral. Bishop Maurice starts the rebuilding of a new, much larger cathedral.

Africa

• Mahdia campaign: The navies of Genoa and Pisa take the capital of the Zirids, and occupy Mahdia for a year. Subsequently, both republics obtain trading privileges.
• Completion of Bab al-Futuh, Cairo

Japan

• January 3 – Emperor Shirakawa abdicates in favor of his 7-year-old son Horikawa after a 14-year reign. He exerts his personal power to set the cloistered rule system further in motion.

Middle East

• May: The marriage of Caliph al-Muqtadi and Mah-i Mulk is consummated. This marriage strengthens the political relation of Malik-Shah I and the Caliph.

By topic

Religion

• May 9 – The relics of Saint Nicholas, patron saint of seafarers, are stolen by Italian sailors from his church in Myra (modern Turkey) and transported to Bari in southern Italy.
• September 16 – Pope Victor III dies after a 1-year pontificate at Monte Cassino. He is buried in the abbey's chapter house.

• September 13 – John II Komnenos, Byzantine emperor (d. 1143)
• Ibn Quzman, Andalusian poet and writer (approximate date)
• Reginald III (or Renaud), count of Burgundy (approximate date)
• Theoderich van Are (or Dietrich), German nobleman (d. 1126)

• June 9 – Otto I ("the Fair"), prince of Olomouc (b. 1045)
• June 27 – Henry I the Long, margrave of the Nordmark
• September 9 – William the Conqueror, king of England
• September 16 – Victor III, pope of the Catholic Church
• September 25 – Simon I, French nobleman (b. 1025)
• November 12 – William I, French nobleman (b. 1020)
• December 13 – Maria Dobroniega, duchess of Poland
• December 27 – Bertha of Savoy, Holy Roman Empress (b. 1051)
• Abu Bakr ibn Umar, military leader of the Almoravids
• Abū Ishāq Ibrāhīm al-Zarqālī, Arab astrologer (b. 1029)
• Arnold of Soissons (or Arnoul), French bishop (b. 1040)
• Asma bint Shihab, queen and co-regent of Yemen
• Blot-Sweyn, king of Svealand (approximate date)
• Eustace II, count of Boulogne (approximate date)
• Leo Diogenes, Byzantine co-emperor (b. 1069)
• Solomon (or Salomon), king of Hungary (b. 1053)
• Yaropolk Izyaslavich, prince of Turov and Volhyn