The Main Building 1917 with the 1921 'L wing' additions, the Senior Patio, the 1921 original Science Building—current Home Economics Building, the Streamline Moderne style 1937 Auditorium, and the first 1923 Torrance Elementary School, now referred to as the Annex: are all listed on the National Register of Historic Places (in 1983). These were Torrance's first such landmark listings. In 1921 a scenic Spanish Colonial Revival glazed tile fountain and Mexican Saltillo tile patio was added to Torrance High's Mediterranean Revival style Main Building, along with the attached 'L wing' expansion. The patio area is frequently seen in "Beverly Hills, 90210", has been known for decades as the "Senior Patio," and is traditionally off-limits to underclassmen. The seniors of the class of 1975 never had access to the patio which was under renovation during their entire senior year. The Main Building received a major exterior restoration and interior modernization in the late 1970s and is the campus building most often seen on film.