Istanbul or Constantinople?

Istanbul or Constantinople ? Istanbul since 1453 ? The truth is that Constantinople was never renamed officialy by the Ottomans in 1453 and was reffered as Kostantiniyye قسطنطينيه by the Ottomans which is actually the Arabic version of Constantinople. Eventually that city was renamed to Istanbul in 1930 by Kemal Ataturk. It’s also true that the names Istanbul (from the Greek phrase Is-tin-poli), or Stambul or Islambol were also used by the Ottomans. But Constantinople still continued to be the official na