Several beautifully preserved historical cathedrals and churches stand out within the walls of the Kremlin. Built at different times, by master craftsmen of the time, these magnificent churches have played a fundamental role in the history of the Orthodox Church and the Russian state. The Cathedral of the Annunciation was the church of the princes and tsars of Moscow now serves as a museum, but retains its majestic atmosphere; the Cathedral of the Dormition is the oldest and most important church in the Kremlin was the Mother Church of the Grand Duchy of Muscovy; the Cathedral of the Archangel was dedicated to the Archangel Michael, the church became the burial place of the rulers of medieval Russia.