Events

• January 6 - Henry of Anjou arrives in England.
• May 24 - Malcolm IV becomes King of Scotland.
• July 9 - Anastasius IV becomes pope.
• November 6 - Treaty of Winchester . Theobald of Bec reconciles Stephen of England and Matilda, ending "The Anarchy" and allowing Matilda's son Henry of Anjou to succeed as king (in 1154).
• The Angevin dynasty takes control of Gascony and Guyenne.
• Andronicus Comnenus is imprisoned for conspiring against Byzantine emperor Manuel I Comnenus.
• Raynald of Chatillon marries Constance of Antioch and becomes Prince of Antioch.
• Baldwin III of Jerusalem takes control of the Kingdom of Jerusalem from his mother Melisende, and also captures Ascalon.
• Taira no Kiyomori assumes control of the Taira clan.

Births

• William, Count of Poitiers, son of Henry of Anjou and Eleanor of Aquitaine (possibly 1152)
• William II, King of Sicily

Deaths

• July 8 - Pope Eugene III
• August 21: Bernard of Clairvaux, preacher of the Second Crusade
• David I, King of Scotland (b. 1084)
• Eustace IV of Boulogne, son of Stephen of England
• Anna Comnena, Byzantine princess and historian (b. 1083)