1131

Events 
 May 9 — Tintern Abbey is founded.
 Ramon Berenguer IV becomes Count of Barcelona.
 Alberich becomes Archdeacon of Reims.
 Fulk of Anjou and Melisende become King and Queen of Jerusalem.
 Construction begins on the Beisi Pagoda in China (completed in 1162).

 Births 
 King Valdemar I of Denmark (d. 1182)

 Deaths 
 March 1 — King Stephen II of Hungary (b. 1101)
 April 30 — Saint Adjutor
 August 21 — King Baldwin II of Jerusalem
 December 4 — Omar Khayyám, Persian poet, astronomer, mathematician, and philosopher (b. 1048)
 Alger of Liège, French monk at Cluny (b. 1055)
 Bohemund II of Antioch (b. 1108)
 Gaston IV of Béarn
 Joscelin I, Count of Edessa
 Peter the Hermit, French priest and crusader
 Ramon Berenguer III, Count of Barcelona (b. 1082)