The Washington University Hilltop Campus Historic District was the site of the 1904 Louisiana Purchase Exposition and the 1904 Summer Olympics. Many of the exposition buildings were temporary in nature, but a number of permanent structures were built and are used by Washington University, which calls this area the Danforth Campus. The district includes more than fifty structures, of which twenty are in the Collegiate Gothic style.The overall plan for the Washington University campus was conceived by Frederick Law Olmsted, and a national competition was held in 1899 for the new buildings. Cope and Stevenson of Philadelphia was the winning firm, drawing on experience gained at Bryn Mawr College, the University of Pennsylvania and Princeton University. As construction proceeded, plans for the Louisiana Purchase Exposition incorporated the new buildings, leasing the campus and providing funding for more buildings.The Collegiate Gothic structures form a unified composition, despite their construction over a fifty-year period. This is attributed to a style guide compiled by architect James P. Jamieson, who defined the use of red granite, green slate shingles and copper flashing and drainage details. Windows are set in limestone surrounds. Buildings are typically sited around a quadrangle that forms a high point, so that the building elevations facing the quad are two stories, while the rear elevations are three stories. Plans are standardized with many buildings using an elongated H-shaped plan with a central tower of three to five stories.
