The De La Salle campus, featuring the Georgian Colonial school building, was opened in September 1939 in time for the school's eightieth year. The gymnasium building was added in 1942, and the Brothers' Residence in 1951. The old "alm's house" building on the new University Heights campus, popularly called "the Armory", initially housed the Rifle Range in its basement and the upper floors served as an arms room and military classroom. In later years, a Biology laboratory was added to the lower floor. One unique feature of the lab was the inclusion of live animals, which were cared for by the students. Also in this building was "the cage", which served as the locker room for the football and track programs. In 1991, the school added a sixth grade.