El Portal Theatre
Architect: Charles Alexander MacNelledge
Opened: June 21, 1928
Located on Fremont Street, this building was Las Vegas‘ cultural center for many years. Its 700seat auditorium and elegant Spanish motif lobby were used for films, plays, music recitals, vaudeville shows, high school graduations and other social events.
This was also the first Air-conditioned building in Las Vegas.
Here are a few old photos I found online: