Other classical Richardsonian features in Alexander include its steep gabled roof, with tall dormers and the zig-zag detail under the eaves. Alexander was well-conceived to serve its purpose as a large meeting hall. The two towers on the north side of the structure served as stairway towers to the balcony seats. (These towers, as well as the taller southern towers, echoed the towers in the nearby Bonner-Marquand Gymnasium and Witherspoon Hall.) The ambulatory, which, in 1928, was glassed in, featured seven entrances into the hall itself and ensured good circulation.