The new glass curtain wall continues to rise up the sides of 660 Fifth Avenue, a 39-story commercial building in Midtown, Manhattan. Designed by Kohn Pedersen Fox and developed by Brookfield Properties, the project involves interior renovations and the complete re-cladding of the 1957 office tower originally designed by Carson & Lundin. The 1.25 million-square-foot property is located along Fifth Avenue between West 52nd and 53rd Streets and was formerly addressed as 666 Fifth Avenue.

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