Universal, which contains Siquieros’ mural called La Marcha de la Humanidad (The March of Humanity). The building, which contains four floors and has an area of 134,000 square feet, also contains a theatre, two joined galleries and other facilities. Siqueiros’ mural covers the dome on the top floor, and up to one thousand spectators can stand on the rotating platform beneath the mural. Accompanying the viewing experience, a light and sound program that was designed by Manuel Suárez y Suárez plays to educate the viewers about the mural. The next floor down features a space for local and international art exhibitions. Below this floor is a theater that features various performances, as well as a small shopping area called the Universal Forum Emerging Art Space (EAE). The basement of the Polyforum is an open space that can be used for storage as well as exhibitions. In 2011, for the 40th anniversary of the structure, the Forum's two art galleries named after Dr. Atl and Mario Orozco Rivera were renovated and merged into one gallery, measuring over 300 square meters. The first served as the site museum with a space of 145 meters squared. Its permanent exhibition consisted of photographs and models and sketches related to the painting of the site's mural. It also contained biographical information in the form of documents and photographs of Manuel Suárez y Suárez, the sponsor of the Polyforum along with that of Siqueiros. The gallery contains a statue of Manuel Suárez y Suárez. The second gallery dedicated to Orozco Rivera measured 169 meters squared and is shows mainly temporary exhibits of painting, sculpture and photography. The new gallery's first exhibition of 2011 was called “My Trend Week," and it was designed to display the works of new artistic talent in architecture as well as graphic, industrial and interior design. The combined space has been tentatively renamed “Espacio de Arte Emergente” (Emerging Art Space) . La Marcha de la Humanidad (The March of Humanity) Inside the Polyforum hosts Siqueiros’ largest mural ever to be created, which is fully titled, The March of Humanity on Earth and Toward the Cosmos: Misery and Science. Including the exterior panels, the mural measures 8,700 square meters. Siqueiros described the theme as “Naked people close to the soil, a woman with a child on her lap, and smaller children raising their arms begging for bread. They are hungry, the oldest, doubled