Mississippi State's campus is centered on the main quadrangle, called the Drill Field due to its heavy use by the Corps of Cadets prior to the end of World War II. The Drill Field is defined at its north and south ends by the mirror-image buildings, Lee Hall (the original University building, now the division of languages building) and Swalm Hall (home to the Dave C. Swalm School of Chemical Engineering). Old Main was the original dormitory, west of Lee Hall; it burned in a tragic fire and was replaced by the Colvard Student Union. The largest building fronting the Drill Field is Mitchell Memorial Library