Moscow is the capital and most populous federal subject of Russia. The city is an important political, economic, cultural, and scientific center of Russia and the continent.
Moscow is the most northern megacity on Earth, the second most populated city in Europe, behind Istanbul, and the sixth most populated in the world.
Moscow sits on the Moskva River in the Central Federal District of European Russia.
Moscow is the home of the Kremlin, an ancient stronghold which is today, the residence of the Russian president and executive power of the Russian government.
The Kremlin is also one of several World Heritage Sites in the city.
Both chambers of the Russian Parliament (the State Duma and the Federation Council) have their headquarters in Moscow.
The city is served by an extensive transport network which includes three international airports, nine train stations, and one of the deepest metro systems in the world, the Moscow Metro, surpassed only by Tokyo for the number of passengers. The underground system is recognized as one of the most architecturally rich and varied, with its 185 stations distributed throughout the city.
According to Forbes 2011, Moscow has the second largest billionaire community in the world.