* 1955: International design competition for the Sydney Opera House is announced.
* 1957: Danish architect Jørn Utzon's design is selected as the winner.
* 1959: Construction begins on the Sydney Opera House.
* 1967: Jørn Utzon resigns from the project due to creative differences with the government.
* 1973: Sydney Opera House is completed.
* 1973: Sydney Opera House is officially opened by Queen Elizabeth II.
* 2007: Sydney Opera House is declared a UNESCO World Heritage Site.
The Sydney Opera House is one of the most iconic buildings in the world and is a symbol of Australia. It is a beautiful and unique architectural masterpiece that has become a popular tourist destination.