Events

• June 15 – Battle of Lyndanisse: Danish crusaders led by King Waldemar II conquer Tallinn. The Flag of Denmark allegedly falls from the sky during that battle.
• November 5 – Damietta, Egypt falls to the Crusaders after a siege.
• Saint Francis of Assisi introduces Catholicism into Egypt, during the Fifth Crusade.
• The Egyptian city of Al Mansurah is founded.
• Twenty-one Lithuanian dukes sign a peace treaty with Halych-Volhynia.
• The windmill is first introduced to China with the travels of Yelü Chucai to Turkestan.
• The Hojo family, vassals of the Shogun, reduce him to a figurehead.

Births

• Christopher I of Denmark (d. 1259)
• Guillaume de Gisors, Grand Master of the fictional Priory of Sion (d. 1307)

Deaths

• February 13 – Minamoto no Sanetomo, Japanese shogun (b. 1192)
• May 5 – King Leo II of Armenia (b. 1150)
• May 14 – William Marshal, 1st Earl of Pembroke (b. 1146)
• June 17 – David of Scotland, 8th Earl of Huntingdon
• November 3 – Saer de Quincy, 1st Earl of Winchester, English baron and rebel
• Raymond-Roupen of Antioch
• John de Courcy, knight and Earl of Ulster (b. 1160)
• Peter II of Courtenay, Latin Emperor of Constantinople
• Yolanda of Flanders, wife and regent of Peter of Courtenay
• Jayavarman VII, ruler of the Khmer Empire (b. 1181)

Ongoing events

• Fifth Crusade (1217–1221)