The O2 Institute (originally known as the Digbeth Institute) is a music venue located in Birmingham, England. The venue opened in 1908 as a mission of Carrs Lane Congregational Church. It has also served as an event centre, civic building and nightclub. It has three main rooms: the 1,500-capacity main auditorium called O2 Institute1 (formerly "The Institute") which has two seated upper balcony levels, the downstairs room which holds up to 600 people called O2 Institute2 (formerly "The Library") and the 250-capacity upstairs room O2 Institute3 (formerly "The Temple").