 Designed by Canadian architects Arthur Erickson and Mathers and Haldenby, the 2630-seat Roy Thomson Hall opened in 1982 as the primary home of the Toronto Symphony Orchestra.The previous home of the Toronto Symphony Orchestra, Massey Hall, is the oldest musical theatre venue in Toronto, and remains in operation today.In June 2006, the Four Seasons Centre for the Performing Arts opened as the new home of the Canadian Opera Company and The National Ballet of Canada.