Saint Petersburg (from August 1914 to January 1924) – Petrograd, from January 26, 1924, to September 6, 1991 – Leningrad, colloquial – Peter, Petersburg, abbr. – St. Petersburg) is the second most populated city in Russia. It is a city of federal significance and the administrative centre of the North-western Federal District. Tsar Peter founded it on May 16, 1703. Between 1714 and 1728 and 1732 and 1918, it was the capital of the Russian state.