The Moscow Kremlin or simply the Kremlin is a fortified complex in Moscow, Russia. Located in the centre of the country's capital city, it is the best known of the kremlins (Russian citadels) and includes five palaces, four cathedrals, and the enclosing Kremlin Wall along with the Kremlin towers. Within the complex is the Grand Kremlin Palace, which served as the royal residence of the Emperor of Russia. It is now the official residence of the President of the Russian Federation.
https://en.wikipedia.org/wiki/Kremlin