Events

• January 6—Henry of Anjou arrives in England.

• May 24—Malcolm IV becomes King of Scotland.

• July 12—Pope Anastasius IV succeeds Pope Eugene III as the 168th pope.

• August 19 – Baldwin III of Jerusalem takes control of the Kingdom of Jerusalem from his mother Melisende, and also captures Ascalon.

• November 6—Treaty of Winchester (also known as Treaty of Wallingford): 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.

• Taira no Kiyomori assumes control of the Taira clan.

• The city of Oberglatt (present-day Switzerland) is first mentioned in written literature.

• Estimation: Constantinople, capital of the Byzantine Empire becomes the largest city of the world, taking the lead from Merv in the Seljuk Empire.

• Islam is introduced to the Maldives.

Births

• August 17—William IX, Count of Poitiers (d. 1156)

• Cathal Crobdearg Ua Conchobair, King of Connacht (d. 1224)

• Kamo no Chōmei, a Japanese author, poet (waka), and essayist

Deaths

• May 24—King David I of Scotland (b. 1084)

• July 8—Pope Eugene III

• August 16—Bernard de Tremelay, fourth Grand Master of the Knights Templar (at the Siege of Ascalon)

• August 17—Eustace IV of Boulogne, son of Stephen of England (b. c. 1130)

• August 21—Bernard of Clairvaux, French churchman (b. 1090)

• December 16—Ranulph de Gernon, 2nd Earl of Chester (b. c. 1100)

• Gilbert Fitz Richard de Clare, Earl of Hertford (b. 1115)

• Anna Comnena, Byzantine princess and historian (b. 1083)