1223

Events 
 March 25 – Sancho II is crowned King of Portugal
 May 31 – Battle of the Kalka River: The Mongol armies of Genghis Khan defeat the Russian warriors.
 August 6 – Louis VIII is crowned King of France.
 The Franciscan Rule is approved by Pope Honorius III.
 Failure of an attempt by the Sicilian fleet to reconquer Jerba.

 Births 
 John FitzAlan, 6th Earl of Arundel (d. 1267)
 Baibars, Mamluk Sultan of Egypt and Syria (d. 1277)
 Hugh le Despencer, 1st Baron le Despencer (d. 1265)
 Llywelyn ap Gruffydd, Last Native Prince of Wales (d. 1282)

 Deaths 
 March 8 – Wincenty Kadłubek, Polish bishop and historian (b. 1161)
 March 25 – King Afonso II of Portugal (b. 1185)
 July 14 – King Philip II of France (b. 1165)
 Giorgi IV Lasha, King of Georgia (b. 1192)
 Giraldus Cambrensis Cambro-Norman clergyman and chronicler (b. 1146)
 Mstislav III of Kiev
 Mukhali, Mongol general
 Unkei, Japanese sculptor (b. 1151)

 References