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
Cairo Opera Ballet Company in 1971, followed by President Anwar Sadat severing Egypt's ties with Russia in 1972, led to a serious decline of the company. The company and its ballet school had a resurgence following the construction of the new Cairo Opera House in 1988. Since 2004, Erminia Gambarelli Kamel has been the company's artistic director. Trained at the La Scala Theatre Ballet School, Kamel joined the Cairo Opera Ballet Company as a principal dancer in 1982. One of the soloists is Mahmoud Atef El Henidy, since 2004–2013. Cairo Opera Ballet Company The Cairo Opera Ballet Company is the resident ballet company of