1148

Events 
 Ramon Berenguer IV, Count of Barcelona fought and beat Tortosa for the Moors.
 King Afonso I of Portugal takes Abrantes from the Moors.
 Anna Comnena writes the Alexiad, which is a biography of her father, Emperor Alexius I.

 Births 
 John of Brienne, king of Jerusalem and Latin Emperor of Constantinople (d. 1237)
 Qiu Chuji, Chinese Taoist (d. 1227)
 Pope Honorius III (d. 1227)

 Deaths 
 April — Amadeus III of Savoy (b. 1095)
 Conan III, Duke of Brittany (b. 1070)
 Gilbert de Clare, 1st Earl of Pembroke (b. 1100)
 William de Warenne, 3rd Earl of Surrey
 Alphonse I of Toulouse (b. 1103)