Just as you have spelt it.
Auditorium
The word is spelled auditorium. The students assembled in the auditorium.
The correct spelling is auditorium.
sala, anfiteatro, teatro
The plural of auditorium is auditoriums.
the auditorium is in the main building. The building where you take your classes. The auditorium will be on the first floor.
Keller Auditorium opened in 1917 as the Portland Municipal Auditorium. It was later renamed Keller Auditorium in 2000 in honor of a former mayor of Portland.
Kresge Auditorium was created in 1955.
Hill Auditorium was created in 1913.
Morse Auditorium was created in 1906.
Foellinger Auditorium was created in 1907.
Ibirapuera Auditorium was created in 2005.