One Astor Plaza

 One Astor Plaza is a 745 ft (227 m) high skyscraper in Times Square in Midtown Manhattan, New York City. Completed in 1972, the building is 54 stories tall and was designed by Der Scutt of Ely J. Kahn & Jacobs. Originally known as the W. T. Grant Building as headquarters of the eponymous, now-defunct retailer, it is currently the headquarters for Viacom and houses the MTV Studios, Minskoff Theatre, Best Buy Theater, and some retail outlets. It is located at 1515 Broadway between West 44th & 45th Streets. Previously, the Astor Hotel occupied this location. It was built in 1904 and closed in 1967. Construction of the W. T. Grant Building began in 1968 and was completed in 1972.

 Second Floor: MTV Studios

Astor Plaza houses the MTV Studios, which is owned by Viacom, the building's primary tenant. The studios are located on the mezzanine second story of the building. MTV acquired it in 1997. It is split into three major studios all located by the floor-to-ceiling windows and iconic window shades. The three studios are named after the three sections of Manhattan: the Uptown Studio, the Midtown Studio, and the Downtown Studio. They are named so because they are proportional to the real sections of Manhattan. The Uptown Studio was home to MTV's former flagship program, Total Request Live, during the show's run from 1998 to 2008. The Midtown Studio is used by MTV News. The smallest studio, the Downtown Studio, is occasionally used for other countdown shows, such as Direct Effect and Big Ten. It is occasionally used as a temporary green room if the actual green room is occupied. The MTV Studios also include dressing rooms, control rooms, a cafeteria, and some offices.

MTV also uses the seventh floor roof and many upstairs floors in the building.