WEBSaint Petersburg (Russian: Са́нкт-Петербу́рг Sankt-Peterburg), known as Petrograd (Петроград) in 1914-1924 and Leningrad (Ленинград) in 1924-1991, is the second largest city of Russia, with 5.6 million inhabitants (2021), and the former capital of the Russian Empire.Founded in 1703, it is not ancient, but its historical cityscape is remarkably well …