Roy Thomson Hall is a concert hall located at 60 Simcoe Street in Toronto, Ontario. It is the home of the Toronto Symphony Orchestra and the Toronto Mendelssohn Choir. 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. The hall seats 2630 and features a pipe organ built by Canadian organ builders Gabriel Kney of London, Ontario.