The new Williams-Sonoma Flagship Store at Columbus Circle is part of this 2.8 million sq. ft. mixed-use complex. Located in a curving arcade at the base of the building in this upscale shopping mall, this 10,500 sq. ft. store includes a 7,013 sq. ft. mezzanine level. Up a staircase set far in the back on the mezzanine is a 3,500 sq. ft. showroom for the brand’s home-interiors offshoot. The floor is about half the size of the cooking store below. The downstairs store offers separate spaces for cooking lessons and showroom.