The 1240s was a decade that began on 1 January 1240 and ended on 31 December 1249.

Millennium: 2nd millennium
Centuries: 12th century13th century14th century
Decades: 1210s 1220s 1230s1240s1250s 1260s 1270s
Years: 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249
Categories: BirthsDeathsArchitecture
EstablishmentsDisestablishments

Events change

Births change

Deaths change