641 Lexington Avenue

 office building, skyscraper

410-foot, 32-story International-style office building completed in 1964. Designed by Emery Roth & Sons, it is clad in a curtain wall of dark-tinted glass and black and silver aluminum. The ground floor is mostly lined with plate-glass storefronts, with bands of black granite above and below. The main entrance is in two bays at the center of the long, south facade on 54th Street, with a deeply-recessed glass wall and two sets of revolving doors. There are two loading docks at the far east end.

The upper floors have thin, vertical mullion of silver aluminum and black aluminum spandrel panels.There is a shallow, full-floor setback above the 7th floor (wider at the east end, with a shallow setback one floor lower), with a wider setback above the 9th floor, forming a lower roof of the wing at the west end that extends to the avenue. At the east half, there is only a shallow setback above the 9th floor, followed by a somewhat deeper setback above the 11th floor. The slab tower rises from the west half of this setback, while the east half extends another three floors to a mid-roof line at the east end. There are no setbacks on the north side.

There is a mechanical floor at the 15th floor, with black metal vents in place of windows, and a double-height mechanical floor at the top, screening the rooftop equipment. The ground floor at the west end is occupied by a FedEx Office.

On the 21st floor is Bloomingdale Properties which owns the Bloomingdale 59th Street store.

www.culbro.com/bloomprop/