Year 1087 (MLXXXVII) was a common year starting on Friday (link will display the full calendar) of the Julian calendar. Events By place Europe Summer – The Taifa of Valencia falls under the domination of Rodrigo Díaz de Vivar (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 – King William I (the Conqueror) dies in Rouen after a fall from his horse. He is succeeded by his third son William II who becomes king of England. 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. </onlyinclude> Births 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 I of Are (or Dietrich), German nobleman (d. 1126) Deaths June 9 – Otto I (the Fair), prince of Olomouc (b. 1045) June 27 – Henry I (the Long), margrave of the Nordmark September 9 – William I (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.