The Eighth Wonder is a 1995 opera by Alan John and with a libretto by Dennis Watkins about the building process of the Sydney Opera House.

Opera Australia is the principal opera company in Australia. Based in Sydney, New South Wales, its performance season at the Sydney Opera House accompanied by the Opera Australia Orchestra runs for approximately eight months of the year, with the remainder of its time spent at the Arts Centre Melbourne, where it is accompanied by Orchestra Victoria. In 2004, the company gave 226 performances in its subscription seasons in Sydney and Melbourne, Victoria, attended by more than 294,000 people.