Saint Petersburg (short: SPb, Russian: Санкт-Петербург) is a city of Russia located on the Neva River at the head of the Gulf of Finland on the Baltic Sea. It is informally known as Piter (Пи́тер). SPb is the northernmost city of the world with over one million people. SPb is often described as the most Westeuropean city of Russia. From 1924 to 1991, in honor of Lenin, the founder of the Soviet Union, the city was called Leningrad (Ленинград).