Queen Sofía Palace of the Arts, the last great component of the City of Arts and Sciences, El Palau de les Arts Reina Sofia, was presented on October 9, 2005, Valencian Community Day. An opera house and performing arts center. It contains four large rooms: a Main Room, Magisterial Classroom, Amphitheater and Theater of Camera. It is dedicated to music and the scenic arts. It is surrounded by 87,000 square meters of landscape and water, as well as 10,000 square meters of walking area. The Palau de Les Arts has four sections; the main hall, the master hall, the auditorium, and the Martin y Soler theatre. It holds many events such as opera, theatre and music in its auditoriums. Panoramic lifts and stairways connect platforms at different heights on the inside of the metallic frames of the building. The building has an metallic feather outer roof that rests on two supports and is 230 meters long and 70 meters high. One of the supports allows for part of the building to overhang. The building is supported by white concrete. Two laminated steel shells cover the building weighing over 3,000 tons. These shells are 163 meters wide and 163 meters long.