As you enter the Kremlin through the Kutafya and Trinity towers, the modern Palace of Congresses is on your right. Khrushchev approved the plans for this large steel, glass and marble structure. Built by Mikhail Posokhin, it was completed in 1961 for the 22nd Congress of the Communist Party. When no congresses or international meetings are in session, the palace is used for ballet and opera performances. Sunk 15 meters (49 feet) into the ground so as not to tower over the Kremlin, the Palace contains 800 rooms and the auditorium seats 6,000.