It is one of the most famous and distinctive buildings of the 20th century. Declared a World Heritage Site in 2007, it was designed by the Danish architect Jørn Utzon in 1957 and inaugurated on October 20, 1973.Theater, ballet, opera and musical productions are performed in the building. It is home to the Australian Opera Company, the Sydney Theater Company and the Sydney Symphony Orchestra. It is managed by the Opera House Trust, a public body of the state government of New South Wales.The Sydney Opera House is an expressionist construction with a radically innovative design, made up of a series of large prefabricated shells, each taken from the same hemisphere, that form the roofs of the structure. Although the roof structures of the Sydney Opera House are commonly referred to as shells, they are in fact not shells in the architectural sense of the word, as they are made up of precast concrete panels supported by precast ribs. of the same material. The shells are covered with bright white and matte cream tiles, forming a faint inverted "V" pattern, although viewed from a distance they appear uniformly white. The two largest groups of vaults that make up the theater's roof each belong to the Concert Hall and the Opera Theater. The other rooms have smaller groups of vaults as roofs. The scale of the shells was chosen to reflect the height needs of the interior, with low spaces at the entrance rising above the seating areas until reaching the tall stage towers.A very large group The smallest of the shell system is located next to the entrances and the monumental staircase, and one of the complex's restaurants.The interior of the building is built of pink granite extracted from the region of Tarana, wood and plywood from New South Wales.The Sydney Opera House contains five theatres, five rehearsal studios, two main halls, four restaurants, six bars and numerous souvenir shops.