what modern day turkish city now stands where constantinople once was
Istanbul (/ËÉªstÃ¦nËbÊl/ or /ËÉªstÃ¦nËbuËl/ or /ÉªËstÃ¦nbÊl/; Turkish: Ä°stanbul [isËtÉnbuÉ«] ( listen)), historically known as Constantinople and Byzantium, is the most populous city in Turkey and the country's economic, cultural, and historic center.