CBS Building
The CBS Building (also known as Black Rock and 51W52) is a 38-story, tower at 51 West 52nd Street in the Midtown Manhattan neighborhood of New York City. It is the headquarters of the CBS broadcasting network. The building was constructed from 1961 to 1964 and was the only skyscraper designed by Eero Saarinen, who referred to the building as the "simplest skyscraper statement in New York". The interior spaces and furnishings were designed by Saarinen, then Florence Knoll Bassett after the former's death. The building was also the headquarters of CBS Records (later Sony Music Entertainment) before the early 1990s. The building is located on the eastern side of Sixth Avenue (Avenue of the Americas) between 52nd and 53rd streets, with its main entrances on the side streets. The "Black Rock" nickname is derived from the design of its facade, which consists of angled dark-gray granite piers alternating with dark-tinted glass. The facade was designed to make the building appear as a continuous slab. The building has a gross floor area of approximately . The building's superstructure is made of reinforced concrete, and steel beams are only used below ground; the concrete frame uses polyurethane insulation. The design was