The Merchandise Mart (or the Merch Mart, or the Mart) is a commercial building located in downtown Chicago, Illinois. When it was opened in 1930, it was the largest building in the world, with 4 million square feet (372,000 m2) of floor space. The Art Deco structure is located at the junction of the Chicago River's branches. The building is a leading retailing and wholesale destination, hosting 20,000 visitors and tenants per day as of the late 2000s.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...

The Wrigley Building is a skyscraper located at 400–410 North Michigan Avenue on Chicago's Near North Side. It is located on the Magnificent Mile directly across Michigan Avenue from the Tribune Tower. It was built to house the corporate headquarters of the Wrigley Company. == History == When ground was broken for the Wrigley Building in 1920, there were no major office buildings north of the Chicago River. The Michigan Avenue Bridge, which spans the river just south of the building, was still under construction. The land was selected by chewing gum magnate William Wrigley Jr. for the headquarters...

The Palmolive Building, formerly the Playboy Building, is a 37-storey Art Deco building at 919 N. Michigan Avenue in Chicago. Built by Holabird & Root, it was completed in 1929 and was home to the Colgate-Palmolive-Peet corporation. The Palmolive Building was renamed the Playboy Building in 1965 when Playboy Enterprises purchased the leasehold of the building. It was home to the editorial and business offices of Playboy magazine from that time until 1989 when Playboy moved its offices to 680 N Lake Shore Drive. Playboy had sold the leasehold in 1980 and signed a 10-year lease that expired in 1990...