1143

Events

* Manuel I Comnenus becomes Byzantine Emperor.
* September 26 — Pope Celestine II succeeds Pope Innocent II as the 165th pope.
* October 5 — Treaty of Zamora: Portugal is recognized by the Kingdom of Leon as an independent kingdom, although it has functioned as one since the Battle of São Mamede.
* Robert of Ketton makes the first European translation of the Qur'an into Latin.
* The exploration of the uncharted eastern parts of Germany begins, and results in the founding of cities such as Lübeck.
* Baldwin III is crowned King of Jerusalem, succeeding his father Fulk.
* The Romans declare their independence of the Pope.
* Roman senate was revived to operate.

Births

* July 31 — Emperor Nijō of Japan (d. 1165)
* Pope Gregory IX (d. 1241)
* King William I of Scotland (d. 1214)

Deaths

* April 8 — John II Comnenus, Byzantine Emperor (b. 1087)
* September 24 — Agnes of Germany, daughter of Henry IV, Holy Roman Emperor (b. 1072)
* September 24 — Pope Innocent II
* November 13 — King Fulk of Jerusalem, Count of Anjou (b. c. 1089/1092)
* Hugh II, Duke of Burgundy (b. 1084)
* William of Malmesbury, English historian (b. 1080)
* Zamakhshari, Persian scholar (b. 1070)
* December 12 — Kogyo-Daishi, restorer of Shingon Buddhism in Japan (b. 1095)