The nation of Russia has designed and used various flags throughout history. Listed in this article are flags — federal, administrative, military, etc. — used between the time of the Tsardom of Russia (1547–1721), Russian Empire (1721–1917) and today's Russian Federation (1991–present day). Also included are flags from the USSR (1922–1991), a country that existed as a federal union of 15 distinct national republics, including the Russian SFSR (1917–1991).