Ferdinand III of Castile (1199/1201-1252)
May 30 King of Castile and Toledo (1217-52) and King of León and Galicia (1230-52) who greatly expanded the kingdom, dies at around 50-53
- Jun 29 King Abel of Denmark (b. 1218)
- Aug 1 Giovanni da Pian del Carpine [John of Plano Carpini], Italian friar, explorer and diplomat (1st European traveller to give account of the Mongol Empire), dies (b. c. 1185)
- Nov 26 Blanche of Castile, Queen of Louis VIII of France, regent to son Louis IX, dies at 64
Assassination
Drug Overdose
Gunshot Wound
Murder
Plane Crash
Suicide