The Sydney Opera House (悉尼歌剧院) is a famous building in Sydney. It is the biggest art center in the world. Before it was built, people gave concerts in Sydney’s Town Hall and held an international design game in 1956. After that, the Sydney Opera House was built. It was opened in 1973. Since it opened, the Sydney Opera House has attracted (吸引) lots of visitors year after year. More than 200, 000 travelers come to the building each year. In a year, more than two million people join in all kinds of games at the Opera House. Guided tours (导游) are available every day of the year except Christmas Day and Good Friday.