The Merchandise Mart (or the Merch Mart, or the Mart) is a commercial building located in the Near North Side of Chicago, Illinois, United States. When it opened in 1930 it was the largest building in the world, with 4,000,000 square feet (372,000 m2) of floor space. Built by Marshall Field & Co. and later owned for over half a century by the Kennedy family, the Mart centralized Chicago's wholesale goods business by consolidating architectural and interior design vendors and trades under a single roof. It has since become home to several other enterprises, including the Shops at the Mart, the Chicago...