In 1903, Daniel H. Burnham, principal architect of the 1893 Chicago World's Fair, was chosen to design Union Station. He mo...deled the Station arches to symbolize its primary function as a gateway. Opening on October 27, 1907, Burnham used the monumental Beaux-Arts style, the Baths of Caraculla and Diocletian and the triumphal Arch of Rome as inspiration in designing what was then the largest...