Britannica.com, Istanbulبایگانیشده در ۱۸ دسامبر ۲۰۰۷ توسط 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.
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Britannica.com, Istanbulبایگانیشده در ۱۸ دسامبر ۲۰۰۷ توسط 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.