Daniel Hudson Burnham, FAIA (September 4, 1846 – June 1, 1912) was an American architect and urban planner. He was the Director of Works for the World's Columbian Exposition in Chicago. He took a leading role in the creation of master plans for the development of a number of cities, including Chicago and downtown Washington D.C. He also designed several famous buildings, including the Flatiron Building in New York City and Union Station in Washington D.C.