When Rosary College first began constructing new buildings on campus to expand the facilities, Power Hall, Power House (the original science building now the Magnus Arts Center) and Mazzuchelli Hall were the first three buildings to be erected. It was clear, however, that more space was needed. It was the Great Depression, however, and construction and money were hard to come by. Finally, in January 1931, ground was broken and Lewis Hall was built through the generous gift of $150,000 from Mr. and Mrs. William Lewis whose five daughters were Rosary alumnae. The building was completed as the third side of the campus’ quadrangle and was dedicated on June 1, 1932. Since opening, Lewis Hall has housed the university's main administrative offices and classroom space.