Historical Events
- May 31 Mongol invasion of the Cumans: Battle of the Kalka River - Mongol armies of Genghis Khan lead by Subutai defeat Kievan Rus and Cumans
- Jul 14 Louis VIII becomes King of France upon the death of his father, Philip II
- Dec 25 St Francis of Assisi assembles 1st Nativity scene (Greccio, Italy)
World Leaders in 1223
Genghis Khan
Famous People Who Died in 1223
- Mar 8 Wincenty Kadłubek, Polish chronicler (b. 1161)
- Mar 25 Afonso II, 3rd King of Portugal (1211-23), dies at 36
- Jul 14 King Philip II of France (1180-1223) dies at 57