Saint Petersburg (Russian: Санкт-Петербу́рг), formerly and still commonly known as Leningrad (Russian: Ленинград) is a city situated on the Neva River, at the head of the Gulf of Finland on the Baltic Sea. It is Russia's second-largest city after Moscow. The city was founded by Tsar Peter the Great on 27 May [O.S. 16 May] 1703, on the site of a captured Swedish fortress.
1914-1924 known as Petrograd
1924-1991 known as Leningrad