The Sydney Opera House looks like a white sail going to sea on the wind, which is interesting to the surrounding scenery. The Sydney Opera House was conceived and constructed in the 1950s. Since 1955, it has solicited design works from all over the world. By 1956, 233 works of Sydney Opera House from 32 countries had been selected. Later, Danish architect Jon & 183 and Wu Chong's design screen sparrow were selected. It took 16 years and cost 12 million Australian dollars to complete the construction. In order to raise funds, the Australian government also raised funds. The Sydney Opera House Lottery was issued in 1959. About 3,000 performances are held at the Sydney Opera House each year, and about 2 million people attend the event. It is one of the largest performing arts centers in the world. The white roof of the Opera House is made up of more than one million Swedish pottery tiles, which have been specially treated, so it is not afraid of the sea breeze. Under the roof are the concert Hall and Opera Theater, the two major performing venues of the Sydney Opera House. The concert hall is the largest Hall of the Sydney Opera House. It can accommodate 2679 audiences. It is usually used for performing symphony, chamber music, opera, dance, chorus, pop music, jazz and other performances. The most special feature of this concert hall is the Grand Organ, designed and constructed by Australian artist Ronald Sharp, which is known as the world's largest mechanical tracker action organ. It consists of 10,500 wind pipes. In addition, the whole concert hall is made of Australian timber, faithfully presenting its own style.