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'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)