Britannica, IstanbulԱրխիվացված 2007-12-18 Wayback Machine:When the Republic of Turkey was founded in 1923, the capital was moved to Ankara, and Constantinople was officially renamed Istanbul in 1930.
Britannica, IstanbulԱրխիվացված 2007-12-18 Wayback Machine:When the Republic of Turkey was founded in 1923, the capital was moved to Ankara, and Constantinople was officially renamed Istanbul in 1930.