201 E. Chapman Avenue
The raised walk and colonnade behind the library were built in 1919. Built prior to other buildings on campus, its height accommodates a tunnel which contained the school's utility pipes and wiring. To its north were sunken locker rooms and restrooms. A series of bronze plaques commemorating each graduating class is mounted in the walkway. The Science Buildings I & II on Pomona Avenue were built in 1949 and 1953, to replace the old 1923 single-story buildings.