Britannica, IstanbulArchived 18 December 2007 at the 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, IstanbulArchived 18 December 2007 at the 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.