The Four Seasons Centre for the Performing Arts is a 2,071-seat theatre in Toronto, Ontario, Canada, located at the southeast corner of University Avenue and Queen Street West, across from Osgoode Hall. The land on which it is located was a gift from the Government of Ontario. It is the home of the Canadian Opera Company and the National Ballet of Canada. The building's modernist design by was created by Canadian company Diamond and Schmitt Architects, headed by Jack Diamond. It was completed in 2006. The design includes an unusual glass staircase.