The term 'Russian Citadel' is often used to refer to the KREMLIN, a fortified complex located in the heart of Moscow. The KREMLIN is a symbol of Russian power and has been the official residence of the President of Russia since 1991. It is also home to several important government buildings, including the Grand KREMLIN Palace, the Senate, and the State Duma. The KREMLIN is a UNESCO World Heritage Site and is one of the most iconic landmarks in Russia.