Roy Thomson Hall is a concert hall in Toronto, Ontario, Canada. Located downtown in the city's entertainment district, it is home to the Toronto Symphony Orchestra, the Toronto Mendelssohn Choir, and the esports team Toronto Defiant. Opened in 1982, its circular architectural design exhibits a sloping and curvilinear glass exterior. It was designed by Canadian architects Arthur Erickson and Mathers and Haldenby. Itzhak Perlman acted as a special advisor to the architects on accessibility needs for disabled performers and guests.