Part of Black & White Set
The Sydney Opera House is a modern expressionist design, with a series of large precast concrete "shells", each composed of sections of a sphere of 75.2 metres (246 ft 8.6 in) radius, forming the roofs of the structure, set on a monumental podium. The building covers 1.8 hectares (4.4 acres) of land and is 183 m (600 ft) long and 120 m (394 ft) wide at its widest point. It is supported on 588 concrete piers sunk as much as 25 m (82 ft) below sea level.
Although the roof structures of the Sydney Opera House are commonly referred to as "shells" , they are in fact not shells in a strictly structural sense, but are instead precast concrete panels supported by precast concrete ribs.] The shells are covered in a subtle chevron pattern with 1,056,006 glossy white- and matte-cream-coloured Swedish-made tiles from Höganäs AB, a factory that generally produced stoneware tiles for the paper-mill industry. Though, from a distance, the shells appear a uniform white.
Apart from the tile of the shells and the glass curtain walls of the foyer spaces, the building's exterior is largely clad with aggregate panels composed of pink granite quarried at Tarana.
The original cost estimate in 1957 was $7 million. The original completion date set by the government was 26 January 1963 . Thus, the project was completed ten years late and over-budget by more than fourteen times coming in at a cost of $102 million.