thumb|[[Battle of Muret (1213)]]
Year 1213 (MCCXIII) was a common year starting on Tuesday of the Julian calendar.
Events
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- May 15 – John, King of England submits to Pope Innocent III, who in turn lifts the interdict of 1208 the following year.
- May 30 – Battle of Damme: The English fleet under William Longespée, 3rd Earl of Salisbury, destroys a French fleet off the Belgian port in the first major victory for the fledgling Royal Navy.
- September 12 – Battle of Muret: The Toulousain and Aragonese forces of Raymond VI of Toulouse and Peter II of Aragon are defeated by the Albigensian Crusade, under Simon de Montfort.
- Jin China is overrun by the Mongols under Genghis Khan, who plunder the countryside and cities, until only Beijing remains free, despite two bloody palace coups and a lengthy siege.
- Pope Innocent III issues a charter calling for the Fifth Crusade to recapture Jerusalem.
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- Construction of Kilkenny Castle in Ireland is completed.
Births
- March 9 – Hugh IV, Duke of Burgundy, French crusader (d. 1271)
- June 10 – Fakhr-al-Din Iraqi, Persian philosopher and Sufi mystic
- Ibn al-Nafis, polymath (d. 1288)
- Hethum I, King of Armenia, ruler of the Armenian Kingdom of Cilicia (d. 1270)
Deaths
- January 18 – Queen Tamar of Georgia (b. c. 1160)
- April 13 – Guy of Thouars, regent of Brittany
- April 21 – Maria of Montpellier, Lady of Montpellier, Queen of Aragon (b. 1182)
- September 12 – King Peter II of Aragon (killed in battle) (b. 1174)
- September 28 – Gertrude of Merania, queen consort regent of Hungary (murdered) (b. 1185)
- October 10 – Frederick II, Duke of Lorraine
- October 14 – Geoffrey Fitz Peter, 1st Earl of Essex
- Sharafeddin Tusi, Persian mathematician (b. 1135)