 When the Republic of Turkey was founded under Mustafa Kemal Atatürk on 29 October 1923, the capital was moved from Istanbul to Ankara.As a consequence, population collapsed, from an estimated 1,125,000 in 1914 to about 500,000 in 1924; but population steadily grew during the later 20th century, the metropolitan population surpassing 10 million in the year 2000.The city's name "İstanbul" is a shortened version with a Turkish character of the Medieval Greek phrase "εἰς τὴν Πόλιν" [is tin ˈpolin], meaning "into the city", which had long been in vernacular use by the local population.