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: Frede… (More on 1237)