 In addition to the three concert venues, it also has sound studio, a rehearsal hall, an audio-video complex, an exhibition hall, a hall of light, music rooms, the Allegro restaurant, a Bluthner music room, a summer patio called the Music Terrace and another concert hall that seats 120.The modernistic, cylindrical glass and steel centre is topped by an enormous, 9.5 metre-tall, 2 metric-ton treble clef covered in mozaic gold that rotates like a weathervane, designed by sculptor Zurab Tsereteli.It also has the largest organ in Russia, installed in Svetlanov hall in 2004.