The auditorium was designed by renowned Bay Area architects John Galen Howard, Frederick Herman Meyer and John W. Reid Jr. and built in 1915 as part of the Panama–Pacific International Exposition. The auditorium hosted the 1920 Democratic National Convention, the San Francisco Opera from 1923 to 1932 and again for the 1996 season, the National AAU boxing trials in 1948, and it was the home of the San Francisco Warriors of the National Basketball Association from 1964 to 1967. An underground expansion, named Brooks Hall, was completed in 1958 under the Civic Center Plaza, immediately north of the Civic Auditorium. The famous Mother of All Demos was presented here during the 1968 Fall Joint Computer Conference, and the World Cyber Games 2004 were also held here.