13 févr. 324 - constantinople founded in eastern half establishing new Rome

Description:

roman emeror constatane chose christianity for romes official religon.The city was believed to have been founded in 657 BCE on the site of the ancient city of Thrace by colonists from the Greek city of Megara, who reportedly named it after King Byzantus. The city quickly rose in significance because of its strategic location on the shores of the Bosporus Sea.