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.
Sydney Symphony Orchestra
The Sydney Symphony Orchestra (SSO) is an Australian symphony orchestra that was initially formed in 1908. Since its opening in 1973, the Sydney Opera House has been its home concert hall. The orchestra's current chief conductor is David Robertson.