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|Centuries:||12th century – 13th century – 14th century|
|Decades:||1210s 1220s 1230s – 1240s – 1250s 1260s 1270s|
|Years:||1245 1246 1247 – 1248 – 1249 1250 1251|
Events[change | change source]
- Cologne Cathedral built.
- King Louis IX of France starts the Seventh Crusade. He leaves with an army of 20,000 toward Egypt.
- Roger Bacon publishes the formula for black powder in Europe.
- for more information, see Category:1248 births.