The buildings are Trout Hall (formerly known as the Administration building), Nellie Sparks Hall, Willard Hall, the President's Home, the President's Home Garage, Austin Hall, the Health and Physical Education building, Senior Hall, the Home Management House, Robertson Hall, Lawson Hall, Canning Hall, Addams Hall, and Nash Library.[1] Many are Public Works Administration buildings designed by different prominent Oklahoma architects, including Paul Harris, Solomon Andrew Layton, John Duncan Forsyth and J.O. Parr.[5][27][28][29][30] The Historic District also includes three brick entry gates and the stone bench near Willard Hall donated by the class of 1924, which are designated contributing objects.[5] University property also includes the 145-acre Habitat Area, which is three miles west of the main campus and is used as an outdoor classroom.[31]