Moscow is a band.
Moscow . Moscow has the status of a Russian federal city . By broader definitions Moscow is among the world 's largest cities , being the 14th largest metro area , the 18th largest agglomeration , the 15th largest urban area , and the 11th largest by population within city limits worldwide . The city has served as the capital of a progression of states , from the medieval Grand Duchy of Moscow and the subsequent Tsardom of Russia to the Russian Empire to the Soviet Union and the contemporary Russian Federation . Moscow is the seat of power of the Government of Russia , being the site of the Moscow Kremlin , a medieval city-fortress that is today the residence for work of the President of Russia .