Saint Petersburg (Russian: Санкт-Петербу́рг (help·info), tr.: Sankt-Peterburg, Russian pronunciation: [sankt pʲɪtʲɪrˈburk]) is a city an a federal subject of Russia located on the Neva River at the head of the Gulf of Finland on the Baltic Sea. The city's other names were Petrograd (Петрогра́д, 1914–1924) and Leningrad (Ленингра́д, 1924–1991). It is informally known as Piter (Пи́тер).