|1223 by topic|
|Birth and death categories|
|Births – Deaths|
|Establishments and disestablishments categories|
|Establishments – Disestablishments|
|Art and literature|
|1223 in poetry|
|Wikimedia Commons has media related to 1223.|
- 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.
- Battle of Samara Bend: Volga Bulgars defeat the Mongol army.
- The Franciscan Rule is approved by Pope Honorius III.
- The Sicilian fleet fails in its attempt to reconquer Jerba.
- Livonian Crusade: Estonians revolt against the Livonian Brothers of the Sword and Denmark, and for a brief period reconquer all of their strongholds except Tallinn.
- The Tatar Yoke in Russia begins when the Mongolian army invades, after 87 years of the dominance of the Novgorod Republic state.
- Baibars, Mamluk Sultan of Egypt and Syria (d. 1277)
- Hugh le Despencer, 1st Baron le Despencer (d. 1265)
- John FitzAlan, 6th Earl of Arundel (d. 1267)
- 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)
- date unknown
- Bresc, Henri (2003). "La Sicile et l'espace libyen au Moyen Age" (PDF). Retrieved 17 January 2012.