Merchandise Mart

Built during the 1920s by Marshall Field & Co., Merchandise Mart is the world's largest commercial building, spanning two full city blocks and rising 25 stories high. The building houses furniture showrooms and retail shops, and hosts numerous trade shows and community events each year. In 2007, the Mart was declared the largest LEED-EB (Leadership in Energy and Environmental and Design for Existing Buildings) in the world.