When the Merchandise Mart was opened in 1930, it was the largest building in the world, with 372,000m2 of floor space (4 million sq feet). Today, it is the 9th largest commercial/office building in the world, primarily as a retailing and wholesale destination. Located in Chicago, Illinois, along the Chicago river, the Merchandise Mart has 25 floors and a height of 100 meters (328.08 feet).