Events

• May 24 – The Fifth Crusade leaves Acre for Egypt.

• Damietta is besieged by the knights of the Fifth Crusade.

• The Livonian Brothers of the Sword begin to conquer Estonia.

• Minamoto no Sanetomo becomes Udaijin of Japan.

• Alfonso IX of Castile founds the University of Salamanca.

• Genghis Khan destroys Kara-Khitai.

• Genghis Khan's Mongols, under the leadership of his eldest son Jochi, conduct a second campaign against the Kyrgyz.

• Genghis Khan proposes to the Khwarazm shah of Persia that he accept Mongol overlordship and establish trade relations.

• Saint Pedro Nolasco founds the Order of the Blessed Virgin Mary of Mercy in Barcelona, Spain.

Births

• February 12 – Kujo Yoritsune, Japanese shogun (d. 1256)

• May 1 – John I, Count of Hainaut (d. 1257)

• May 1 – Rudolph I of Germany, Holy Roman Emperor (d. 1291)

• October 30 – Emperor Chūkyō of Japan (d. 1234)

• Abel of Denmark (d. 1252)

• Sir Maurice de Berkeley, English knight (d. 1281)

Deaths

• February 2 – Konstantin of Rostov, Prince of Novgorod (b. 1186)

• May 19 – Otto IV, Holy Roman Emperor

• June 25 – Simon de Montfort, 5th Earl of Leicester, French crusader (b. 1160)

• July 6 – Eudes III, Duke of Burgundy (b. 1166)

• December 30 – Richard de Clare, 4th Earl of Hertford, English politician (b. 1162)

• Al-Adil I, Egyptian general and ruler (b. 1145)

• Henry de Abergavenny, Prior of Abergavenny and Bishop of Llandaff

• Hugh I of Cyprus

Ongoing events

• Fifth Crusade (1217–1221)