30 Rockefeller Center or the Comcast Building is an American Art Deco skyscraper that forms the centerpiece of Rockefeller Center in midtown Manhattan, New York City, NY. The exterior signage was changed to reflect the building's new corporate owner, Comcast, on July 1, 2015. It was formerly called the RCA Building from 1933 to 1988, and later the GE Building from 1988 to 2015. Nicknames include The Slab and 30 Rock. The building is most famous for housing the NBC television network headquarters. At high, the 70-story building is the 14th tallest in New York City and the 39th tallest in the United States.
The building underwent a floor-by-floor interior renovation in 2014. The renovation included new Comcast signage atop the building, new ground-level signage that reads Comcast Building, and (for the first time) display of the iconic NBC Peacock logo on the building's exterior.
The building was completed in 1933 as part of the Rockefeller Center complex. The noted Art Deco architect Raymond Hood led a team of Rockefeller architects. It was named the RCA Building for its main tenant, the Radio Corporation of America, formed in 1919 by General Electric. It was the first building constructed with the elevators grouped in the central core. During construction, photographer Charles Clyde Ebbets took the famous photograph ''Lunch atop a Skyscraper'' on the 69th floor. National Broadcasting Company, had the red and blue networks housed in the new building, which was also nicknamed "Radio City". NBC was the first national radio network in the country and was started by R.C.A. in 1926.
The office of the Rockefeller family occupied Room 5600 on the 56th floor. This space is now occupied by Rockefeller Family & Associates, spanning between the 54th floor and the 56th floor of the building. John D. Rockefeller had a private vault in the basement of the building, accessible via a private elevator from his office.〔(【引用サイトリンク】title=Rockefeller'sVault-05 )〕
In 1985, the building acquired official landmark status. The RCA Building was renamed as the GE Building in 1988, two years after General Electric re-acquired the RCA Corporation.
The building's address became the title of the NBC sitcom ''30 Rock'', which follows the cast and crew of a fictional television show filmed inside the building. Aside from two live episodes, which were produced at NBC's facilities inside the building, the series, which ended in 2013, used the building mostly for exterior and occasional lobby shots, while interior scenes were filmed at Silvercup Studios in Queens.
From the end of 1960 through October 1993, the building's mezzanine level housed the New York City weather forecast office of the National Weather Service; it was relocated to eastern Long Island, on the grounds of Brookhaven National Laboratory at Upton, New York. KWO35, the NOAA Weather Radio station serving the majority of the Tri-State area, originally transmitted from atop the building and remained there until 2014. Due to interference with a U.S. Coast Guard radio channel, the transmitter was eventually relocated atop the MetLife Building.〔(【引用サイトリンク】title=IEM :: PNS from NWS OKX )〕 A weather radar station was also located atop the building〔(【引用サイトリンク】title=National Weather Service New York, NY - Tour: NWS of the Past )〕 (it was previously used as ''Doppler 4000'' during WNBC-TV's local newscasts).
In June 2014, Comcast was granted permission from the Landmarks Preservation Commission to make modifications to the building to reflect its ownership of NBCUniversal. The GE Building would be officially known as the Comcast Building. Comcast plans to replace the neon GE lettering from the top of the building with a tall, LED-lit Comcast wordmark and NBC logo, and add a NBC logo on the building western's facade. Additionally, a new marquee was added to the Avenue of the Americas entrance, advertising it as the home of ''The Tonight Show Starring Jimmy Fallon''.〔〔(【引用サイトリンク】url=http://www.nytimes.com/2014/06/14/nyregion/comcast-seeks-to-replace-ges-initials-at-30-rock.html?_r=0 )〕〔(【引用サイトリンク】url=http://www.nytimes.com/2014/11/25/arts/television/jimmy-fallons-name-goes-on-30-rock-marquee.html )〕
On July 1, 2015, the GE wordmark lights on top of the building were replaced with NBC's rainbow peacock and the Comcast wordmark, and the building became known formally and officially as the Comcast Building.〔http://www.nbcnewyork.com/news/local/comcast-building-30-rock-nbc-peacock-311241431.html〕
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