Ontario Philharmonic has become a notable player in the landscape of classical music in Ontario. It has evolved as one of the most exciting orchestras in the Durham Region and Toronto/GTA areas and it has earned its place among the leading performing arts organizations of the province. The orchestra is comprised of players that are among the finest professional musicians in the GTA and it is led by one of Canada's most distinguished conductors on the international scene, Marco Parisotto. The OP's early history began in Oshawa, Durham Region, where it was founded in 1957. Its stellar growth in recent years has won it the acclaim of both critics and audiences. The OP is comprised of up to seventy-five musicians and it performs its main concert programs in both the Regent Theatre in Oshawa and at Toronto's Koerner Hall (Telus Centre for Performance and Learning). As well, the orchestra performs in various other venues in the GTA. Although the great symphonic and choral/symphonic repertoire is its mainstay, the OP's programs reflect a wide variety of styles from Baroque/Classical/Romantic/Modern to light classical, pop music, jazz and music of the world, in an effort to satisfy the taste of all audiences, diverse cultures, as well as young listeners.