The Sydney Opera House is a globally renowned building that is recognized as a symbol of modernity, despite being open for only about 30 years. It is considered as representative of Australia, just as the pyramids are of Egypt. The construction of the Opera House involved the use of 6,225 square meters of glass and 645 kilometers of electric cable, encompassing 1,000 rooms. The building measures 185 meters in length and 120 meters in width, with roof sections weighing approximately 15 tons each. The roof is covered with 1 million tiles, and it provides guided tours to 200,000 people every year.
Designed by the famous Danish architect, John Utzon, the Opera House's distinctive roof was a key feature that required significant reworking by Utzon for several years before finding a solution in 1961. The construction of the building faced significant cost overruns, and in 1966, Utzon resigned from the project. The building was eventually completed by others and was officially opened by Queen Elizabeth on October 20th, 1973。