the Moscow Kremlin, Russia

The Moscow Kremlin (Russian: Московский Кремль, Moskovskiy Kreml), sometimes referred to as simply The Kremlin, is a historic fortified complex at the heart of Moscow, overlooking the Moskva River (to the south), Saint Basil's Cathedral and Red Square (to the east) and the Alexander Garden (to the west). It is the best known of kremlins (Russian citadels) and includes four palaces, four cathedrals and the enclosing Kremlin Wall with Kremlin towers. The complex serves as the official residence of the President of Russia.
The name The Kremlin is often used as a metonym to refer to the government of the Soviet Union (1922–1991) and its highest members (such as general secretaries, premiers, presidents, ministers, and commissars), in the same way that the metonym Quai d'Orsay refers to the French Ministry of Foreign Affairs or White House refers to the Executive Office of the President of the United States. It is still used in reference to the government of the Russian Federation. "Kremlinology" referred to the study of Soviet and Russian policies.