The Kremlin of Moscow is the geographical and historical center of the Russian capital city Moscow. The name Kremlin is derived from the Russian word кремль (kreml), which means fortified city center. The Moscow Kremlin is located in Red Square, on the left shore of the Moskva River. It’s the seat of the government of the Russian Federation and formerly the Soviet Union. In the time of the Cold War the term the Kremlin was synonymous to the communist rulers. The Moscow Kremlin also has a theater, a museum and numerous other sights, such as the Tsar’s Clock, the Tsar’s Gun and various cathedrals and palaces. Opposite the GUM department store, part of the 2200-meter Kremlin wall, is the Mausoleum of Lenin.