- Jan 6 Ferrand of Portugal freed from the Louvre
- Mar 19 Count Ugolino of Segna elected Pope Gregory IX
- Sep 29 Pope Gregory IX excommunicate German emperor Frederik II
- Oct 4 Assassination of Caliph al-Adil.
- Nov 23 Polish Prince Leszek I the White is assassinated at an assembly of Polish dukes at Gąsawa
- Genghis Khan
Great Khan of the Mongol Empire
- Sep 30 Pope Nicholas IV (d. 1292)