1088

Events 
 Succession of Pope Urban II (1088-1099)
 Work begins on the third and largest church at Cluny
 Rebellion of 1088 against William II of England lead by Odo of Bayeux.
 Mansur ibn Nasir succeeds Nasir ibn Alnas as ruler of the Hammadid dynasty
 University of Bologna was founded.

 Deaths 
 January 6 – Berengar of Tours, French theologian
 July 3 – Robert of Rhuddlan, Norman ruler of most of North Wales
 Naser Khosrow, Persian theologian
 William de Warenne, 1st Earl of Surrey, Norman aristocrat