1237
Events Thomas II of Savoy becomes count of Flanders.Elblag, Poland is founded.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.Frederick II, Holy Roman Emperor defeats Lombard League at Battle of Cortenuova Births Deaths John of Brienne, king of Jerusalem and Latin Emperor of Constantinople Jordanus Nemorarius, German scientist Monarchs/Presidents 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)
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