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
La Scala, Fortitude Valley criteria. The place is important in demonstrating the evolution or pattern of Queensland's history. La Scala is significant as it demonstrates innovative architectural ideas including the large roofdeck for outdoor living, the free planforms linked via the stairwell bay, and the stylistic innovation in the use of decorative elements and materials. La Scala is significant for the unusual scale and form of the building and retaining walls and the contribution these elements make to the Brunswick Street streetscape. Also significant is the aesthetic quality of decorative elements including plaster ceilings, timber batten detailing, leadlight panels and timber work. La Scala