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
• A major fire destroys some 30,000 dwellings in the Chinese capital city of Hangzhou.

Births

Deaths

• John of Brienne, king of Jerusalem and Latin Emperor of Constantinople (born c. 1148)
• Jordanus Nemorarius, German scientist
• Richard Poore, English ecclesiastic

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)
• Joan, wife of Llwelyn the Great

1237

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