1、Constantinople was a major center of commerce, culture, and strategic importance in the Byzantine Empire.
君士坦丁堡是拜占庭帝国重要的商业、文化和战略中心。
2、After the fall of Constantinople to the Ottoman Empire, the city was renamed Istanbul.
君士坦丁堡在被奥斯曼帝国攻陷后，被更名为伊斯坦布尔。