<Tr> <Th> Architect </Th> <Td> Carson & Lundin </Td> </Tr> <Tr> <Th> Developer </Th> <Td> Tishman Realty and Construction </Td> </Tr> <P> 666 Fifth Avenue is a 41 - story office building on Fifth Avenue between 52nd and 53rd Streets in Midtown Manhattan, New York City . The office tower was built in 1957 by Tishman Realty and Construction, which sold it when the corporation dissolved in 1976 . 666 Fifth Avenue was bought by Sumitomo Realty & Development in the late 1990s, and Tishman Speyer bought it back in 2000, adding tenants before selling it yet again to Kushner Properties in 2007 . In 2017, Kushner Properties announced plans to repurpose the building to a design by the British architect Zaha Hadid . </P> <P> The Tishman family via Tishman Realty and Construction built the 1,500,000 - square - foot (140,000 m) tower in 1957 . It was designed by Carson & Lundin, who also simultaneously worked on 600 Fifth Avenue in the nearby Rockefeller Center, and the building was called the Tishman Building . One of its most famous exterior features was the prominent 666 address emblazoned on the top of the building . The other distinctive exterior features are embossed aluminum panels . The original design included lobby sculptures by Japanese American artist and landscape architect Isamu Noguchi, including the "Landscape of the Cloud" which consists of sinuously cut thin railings in the ceiling to create a cloud effect . The cloud is also carried into a ceiling - to - floor waterfall . The penthouse was occupied by the Top of the Sixes restaurant, operated by Stouffer's, which closed in 1996 . For many years the building had a distinctive feature of a T - shaped atrium walk - through open to the sidewalks on 52nd Street, 53rd Street and Fifth Avenue with glass storefronts inside the walk - through . This included a bookstore and another area used for years by Alitalia Airlines . For many years, the building was the home of Benton & Bowles, a major advertising firm . </P>

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