Opera Australia Orchestra associated with working in the Sydney Opera House orchestra pit. The OAO provides orchestral accompaniment to Opera Australia and The Australian Ballet and is one of the few opera orchestras in the world that operates in a repertory style of operation over a period, or season, that can be some months in length. Other opera houses that operate this way are The Metropolitan Opera in New York City, The Royal Opera House Covent Garden in London and La Scala, Milan. 'Repertory style' also infers that over time, certain composers and operas become considered 'standard' to the working operation of the
Central City Opera House which tells the story of wealthy mine-owner Horace Tabor and his second wife Baby Doe Tabor. It was first performed in 1956. In 2001, it was the first opera company in the United States to produce "Gloriana" of Elizabeth I by Benjamin Britten. Gioachino Rossini's "The Barber of Seville" was performed by the Central City Opera in 2015. Samuel Ramey and Beverly Sills have performed at the opera house. It was noted by Daniel Rule, who managed the Central City Opera company, that 29 of the performers of the Metropolitan Opera in New York had performed at Central City. The