CS Knowledge Base

1237 (MCCXXXVII) was a common year starting on Thursday of the Julian calendar, the 1237th year of the Common Era (CE) and Anno Domini (AD) designations, the 237th year of the 2nd millennium, the 37th year of the 13th century, and the 8th year of the 1230s decade. As of the start of 1237, the Gregorian calendar was 7 days ahead of the Julian calendar, which was the dominant calendar of the time.

• 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.
• 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.

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

• 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 (born c. 1148)
• Jordanus Nemorarius, German scientist
• Pons de Capduelh, French troubadour
• September 23 – Snorri Sturluson, Icelandic historian, poet and politician (born c.1178)

• Aragon – James I King of Aragon and count of Barcelona (reigned from 1213 to 1276)
• Castile – Ferdinand III, the Saint King of Castile and León (reigned from 1217 to 1252)
• Joan, wife of Llwelyn the Great