Changing of Russia's Capital

The subject of a song by German band Dschingis Khan (who named their band after Mongolian emperor Genghis Khan), Moscow is named after the Moskva river with runs through the city. Founded in 1147 (400 years before Ivan the Terrible was crowned first Tsar of Russia), Moscow was Russia's first capital city as it was where the seat of the government was (and still is).
In 1721, Tsar Peter 1 (AKA Peter the Great) moved the capital to St Petersburg which was founded on 27 May 1703 as it was a sea port which made it an ideal location or the powerful navy Peter dreamed of building and it was at the time easy access to Europe. He named it after his patron saint St Peter the Apostle who was also the 1ST ever Pope! The land for St Petersburg was reclaimed from the Great Northern War which was between Sweden and Russia (with Finland in the middle). To distance themselves from any German connotations, St Petersburg was renamed to Petrograd in 1915.
During the February Revolution, the capital was moved back to Moscow on 12 March 1917 at the discretion of Vladimir Lenin who feared an invasion at St Petersburg would happen on account of it being a port city.