English: The Sydney Opera House is a multi-venue performing arts centre in Sydney, Australia, identified as one of the 20th century's most distinctive buildings.

Designed by Danish architect Jørn Utzon, the building was formally opened on 20 October 1973] after a gestation beginning with Utzon's 1957 selection as winner of an international design competition. The government of New South Wales, led by the premier, Joseph Cahill, authorised work to begin in 1958 with Utzon directing construction. The government's decision to build Utzon's design is often overshadowed by circumstances that followed, including cost and scheduling overruns as well as the architect's ultimate resignation.

The Sydney Opera House became a UNESCO World Heritage Site on 28 June 2007