1237

Events

* Thomas II of Savoy becomes count of Flanders.
* Elbląg, Poland is founded.
* Representatives of all 4 khanates lead 150,000 Mongol, Turkish and Persian troops into Europe.
* The Mongols invade Russia.
* Gualdo Tadino, Italy, is destroyed by fire.
* The County of Artois is founded in France.
* Baldwin II becomes Latin Emperor of Constantinople.
* Conrad IV of Germany becomes King of Germany.
* The Livonian Brothers of the Sword unite with the Teutonic Knights.
* Battle of Cortenuova: Frederick II, Holy Roman Emperor defeats the Lombard League.
* A major fire destroys some 30,000 dwellings in the Chinese capital city of Hangzhou.

Births

* Bohemond VI of Antioch, ruler of the principality of Antioch

Deaths

* February 2 - Joan, Lady of Wales
* April 15 - Richard Poore, English ecclesiastic
* June 6 - John de Scotia, 9th Earl of Huntingdon
* John of Brienne, king of Jerusalem and Latin Emperor of Constantinople (b. c. 1148)
* Pons de Capduelh, French troubadour

Monarchs

* Aragon - James I King of Aragon and count of Barcelona (reigned from 1213 to 1276)
* Castile - Ferdinand III, the Saint King of Castile and Leon (reigned from 1217 to 1252)