Daniel Hudson Burnham (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 and designed several famous buildings, including the Flatiron Building in New York City and Union Station in Washington D.C. Wikipedia
Descriptions of collections of the Ryerson & Burnham Archives at the Art Institute of Chicago. The Archive collections are notably strong in late 19th and 20th century American architecture, with particular depth in Midwest architecture and architec www.artic.edu/aic/libraries/rbarchives/rbarchcoll.html
The definitive Wikipedia entry for Daniel Burnham. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Daniel_Burnham