Events

• January 11 – The city of Požega is first mentioned in a charter of Andrew II of Hungary.

• March 19 – Pope Gregory IX succeeds Pope Honorius III as the 178th pope.

• November 23 – Polish Prince Leszek I the White is assassinated at an assembly of Piast dukes at Gąsawa.

• Henry III of England declares himself of age and assumes power.

• According to Russian chronicles, Novgorod attacks Finland with devastating results.

• The Estonian ancient fight for independence ends with foreign rule in the country for next 7 centuries.

• Dogen introduces Zen Buddhism into Japan.

Births

• September 30 – Pope Nicholas IV (d. 1292)

• Charles I of Sicily

Deaths

• March 18 – Pope Honorius III (b. 1148)

• July 23 – Qiu Chuji, Chinese founder of Dragon Gate Taoism (b. 1148)

• August 1 – Shimazu Tadahisa, Japanese warlord (b. 1179)

• August 18 – Genghis Khan, founder of the Mongol Empire (b. c. 1162)

• Reginald de Braose, English rebel baron

• Jochi, son of Genghis Khan

• Marco Sanudo, Venetian crusader