| Millennium: | 2nd millennium |
| Centuries: | 12th century – 13th century – 14th century |
| Decades: | 1210s 1220s 1230s – 1240s – 1250s 1260s 1270s |
| Years: | 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 |
| Categories: | Births – Deaths – Architecture Establishments – Disestablishments |
The 1240s decade ran from January 1, 1240, to December 31, 1249.
Events and trends
- Hungary was partially demolished with a great loss of life in 1241–1242 by Mongol armies of the Golden Horde.
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