Moscow Kremlin is an ancient fortress in the heart of Moscow, Russia. It was first built in 1156, and since then it has been rebuilt and reconstructed many times. The current Kremlin is a mixture of different styles, including Russian Revival and Baroque. The Kremlin is home to many of Russia's most important historical and cultural monuments, including the Tsar Bell and Tsar Cannon, the Armoury Chamber, and the Cathedral of the Dormition. It is also the official residence of the President of Russia. The Kremlin is open to visitors from 9:00am to 6:00pm every day, except Thursday. Admission is free for all visitors, but a ticket is required for access to the Armoury Chamber and the Cathedral of the Dormition.