Planning fallacy
The Sydney Opera House was expected to be completed in 1963. A scaled-down version opened in 1973, a decade later. The original cost was estimated at $7 million, but its delayed completion led to a cost of $102 million.
Culture of Sydney
Opera Australia, as at 2015 the world's third-busiest opera company, has its headquarters in Sydney and performs a busy program of mainly classical and occasionally contemporary operas at the Opera Theatre of the Sydney Opera House.