Events

• Domesday Book is completed in England
• Emperor Shirakawa of Japan starts his cloistered rule
• Imam Ali Mosque is rebuilt by the Seljuk Malik Shah I after being destroyed by fire.
• Alfonso VI of Léon and Castille is defeated by the Almoravids, called into Spain by Abbad III of Sevilla.

Deaths

• May 25, Pope Gregory VII
• September 25 - William VIII, Duke of Aquitaine
• Sima Guang, Chinese historian