The Sydney Opera House at night, as viewed from the Sydney Harbour Bridge. It is one of the world's most distinctive 20th century buildings, and one of the most famous performing arts centres in the world. Contrary to its name, the building houses several separate venues rather than a single opera theatre, with the two main venues, the Opera Theatre and the Concert Hall, defined by the two larger shells. The Sydney Opera House is a major performing venue for Opera Australia, The Australian Ballet, the Sydney Theatre Company and the Sydney Symphony.