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.
Opera House, Wellington
Construction work on the building began in 1911, and was originally named "The Grand Opera House" in May 1913 with a plan to open early on Boxing Night that year. The principal architect William Pitt was based in Melbourne, Australia, and much of the work was overseen by Wellington architect Albert Liddy. The opera house finally opened on Easter Saturday of 12 April 1914 to an evening performance by the American Burlesque Company, with a full seating capacity of 2141 in three levels of stalls, dress circle and gallery, including 50 box seats. The original seating upholstery was made and installed by the Wellington company Kirkcaldie & Stains, and the interior features fine plaster moldings and ornate dome. The building was designed with brick masonry outer walls with wooden floors and a timber-framed roof.