Irvine Auditorium is the location for many Penn ceremonies, speaking engagements, movies, and concerts. The balcony houses the eleventh-largest pipe organ in the world, the Curtis Organ, which was built for the Sesquicentennial Exhibition in 1926, and donated to the University in 1928. Each Halloween, the silent movie, The Phantom of the Opera, is shown in Irvine, complete with organ accompaniment.