1183

Events

Alexios II is compelled to condemn his own mother to death. In September, Andronikos Komenos is formally proclaimed Byzantine Emperor before the crowd on the terrace of the Church of Christ of the Chalke. By the end of the month, Andronikos Komenos orders Alexios' assassination; the young emperor is strangled in secret with a bow-string and his body thrown in the Bósporos.
Andronikos I marries Alexios' widow, the 11-year-old Agnes of France.
November - Andronikos makes a treaty with Venice, in which he promises a yearly indemnity as compensation for Venetian losses, during the Massacre of the Latins.
Europe
June 25 - The Peace of Constance is signed, between Frederick Barbarossa and the Lombard League, forming the legal basis for the autonomy of the Italian city republics.
Joseph of Exeter writes the first account of a sport resembling cricket.
Asia

Three-year-old Emperor Go-Toba ascends to the throne of Japan, after the forced abdication of his brother Emperor Antoku, during the Genpei War.
August 14 - Taira no Munemori and the Taira clan take the young Emperor Antoku and the three sacred treasures, and flee to western Japan to escape pursuit by the Minamoto clan.
November 17 - Battle of Mizushima: The Taira Clan defeats the Minamoto Clan.
Near East
February - Raynald of Châtillon has at least five ships freighted over the Isthmus of Suez, which he then uses to pillage the shores of the Red Sea around Jeddah.
William of Tyre is excommunicated by the newly appointed Heraclius of Jerusalem, firmly ending their struggle for power.
The Siege of Kerak is waged between the Ayyubids and the Crusaders, in which regent Guy of Lusignan refuses to fight.
Saladin conquers Syria and becomes sultan.
Births
Chagatai Khan, second son of Genghis Khan, Khan of the Chagatai Khanate
Philippa of Armenia, empress consort of Nicaea
Deaths
June 11 - Henry the Young King, son of Henry II of England
October - Alexios II Komnenos, Byzantine Emperor
November 23 - William Fitz Robert, 2nd Earl of Gloucester
Queen Gongye, Korean queen consort