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.
Postmodern architecture
The Sydney Opera House in Sydney, Australia, by the Danish architect Jørn Utzon (1918–2008) is one of the most recognizable of all works of postwar architecture, and spans the transition from modernism to postmodernism. Construction began in 1957 but it was not completed until 1973 due to difficult engineering problems and growing costs. The giant shells of concrete soar over the platforms which form the roof of the hall itself. The architect resigned before the structure was completed, and the interior was designed largely after he left the project. The influence of the Sydney Opera House, can be seen in later concert halls with soaring roofs made of undulating stainless steel.