Britannica, Istanbul: When the Republic of Turkey was founded in 1923, the capital was moved to Ankara, and Constantinople was officially renamed Istanbul in 1930.نسخة محفوظة 18 ديسمبر 2007 على موقع واي باك مشين.
Britannica, Istanbul: When the Republic of Turkey was founded in 1923, the capital was moved to Ankara, and Constantinople was officially renamed Istanbul in 1930.نسخة محفوظة 18 ديسمبر 2007 على موقع واي باك مشين.