1200s

The 1200s was a decade that began on 1 January 1200 and ended on 31 December 1209. It is distinct from the decade known as the 121th decade which began on January 1, 1201 and ended on December 31, 1210.

• 1200 University of Paris receives charter from Philip II of France
• 1202–1204 Fourth Crusade – diverted to Constantinople
• 1205 April 14: Battle of Adrianople (1205) between Bulgars and Latins
• 1209
  • Albigensian Crusade against Cathars (1209–1218)
  • the Franciscans are founded.