|Covid-19|Death of the Catalan mercenary Reverter de La Guardia, main Almoravid commander in the Maghrid al-Aqsa. His elimination opens the regions to the troops of the Almohads.
December 24 – The County of Edessa falls to Zengi of Mosul (see Siege of Edessa). Raymond of Poitiers, Prince of Antioch, sends Bishop Hugh of Jabala to seek the aid of Pope Eugene III while Manuel I Comnenus brings Raymond under Byzantine influence.
Louis VII capitulates to Pope Celestine II and so earns the pope's absolution.
Normandy comes under Angevin control under Geoffrey of Anjou.
The city of Montauban, France, is founded.
The city of Ljubljana, Slovenia, is first mentioned in historical records.
Giordano Pierleoni founds the revolutionary Commune of Rome.
Failed Byzantine attempt to reconquer Malta.
March 12 – Pope Lucius II succeeds Pope Celestine II as the 166th pope.
March 22 – The first example of an anti-Semitic blood libel is recorded in England, in connection with the murder of William of Norwich.
June 11 – Basilica of St Denis near Paris in the Kingdom of France is consecrated, the first Gothic church.
The Priory in Lesmahagow, Scotland, is founded by Benedictines.
First Knights Templar stronghold is established in the kingdom of León and Castile.
Bohemund III of Antioch (d. 1201)
March 8 – Pope Celestine II
March 22 – William of Norwich, child murder victim
September – Geoffrey de Mandeville, 1st Earl of Essex
Year 1144 (MCXLIV) was a leap year starting on Saturday (link will display the full calendar) of the Julian calendar.