Years: 1234 1235 1236 - 1237 - 1238 1239 1240

Decades: 1200s 1210s 1220s - 1230s - 1240s 1250s 1260s

Centuries: 12th century - 13th century - 14th century

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)