Chicago is the third most populous city in the United States, home to 9.8 million people in its greater metropolitan area. It is one of the major financial centers in the U.S. led by the venerable Chicago Board of Trade, the world's oldest futures and options exchange. Though now merged into the Chicago Mercantile Exchange, its distinctive tower caps the southern end of LaSalle Street and has been featured in many feature films including The Untouchables and Road to Perdition. Highly renowned for its late 19th and early 20th century architecture, Chicago has an incredible mix of styles, including signature works of Frank Lloyd Wright, Louis Sullivan and Ludwig Mies van der Rohe.
Chicago's other cultural highlights include: