The Sydney Opera House is a multi-venue performing arts centre on Sydney Harbour located in Sydney, New South Wales, Australia. It is one of the 20th century's most famous and distinctive buildings and was opened by Queen Elizabeth II on 20th October 1973. The building and its surroundings occupy the whole of Bennelong Point on Sydney Harbour, between Sydney Cove and Farm Cove, adjacent to the Sydney central business district and the Royal Botanic Gardens, and close by the Sydney Harbour Bridge.

The building comprises of multiple performance venues. It also houses a recording studio, cafes, restaurants, bars and retail outlets. The entire structure is absolutely massive. The site itself can fit 7 A380s sitting wing to wing, and the building contains 1,000 rooms. The building was listed as a UNESCO (United Nations Educational, Scientific and Cultural Organization) World Heritage site in 2007.

The first-ever person to perform inside the house's halls was Paul Robeson, in 1960. He was an American bass baritone concert artist and stage and film actor who became famous both for his cultural accomplishments and for his political activism. Educated at Rutgers College and Columbia University, he was a star athlete in his youth. Notably, his gesture was before the construction of the project was completed. The singer had visited the construction workers during lunchtime, climbed the scaffolding, and sang "Ol' Man River" to them.

More Info: en.wikipedia.org