Old Main, at 400 East Tyler Mall on the Tempe campus of Arizona State University, is the oldest building on the campus. It was built in 1898 and was designed by W. A. McGinnis in the Victorian Queen Anne style with Richardsonian Romanesque influences. Along with the Administration/Science Building and a third building no longer extant…Old Main, at 400 East Tyler Mall on the Tempe campus of Arizona State University, is the oldest building on the campus. It was built in 1898 and was designed by W. A. McGinnis in the Victorian Queen Anne style with Richardsonian Romanesque influences. Along with the Administration/Science Building and a third building no longer extant, Old Main defined the first quad on the campus of the Arizona Territorial Normal School; Arizona would not become a state for 14 years after Old Main was dedicated.