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
Cologne Opera former mayor of Cologne. The first opera to be performed there was Carl Maria von Weber's "Oberon". In June of that year the house saw its first world premiere, Wolfgang Fortner's "Die Bluthochzeit". The following month the opera company of La Scala appeared there on tour with Maria Callas in "La sonnambula". The Cologne Opera House occasionally hosts solo recitals and special events; one remarkable such event was concert by jazz pianist Keith Jarrett in 1975 which was recorded and became one of the most popular solo jazz piano recordings of all time, known as The Köln Concert. The house