The Four Seasons Centre for the Performing Arts is a 2,043-seat theatre in Toronto, Ontario, Canada which had its grand opening Wednesday, June 14, 2006. The COC (Canadian Opera Company) organized a competition to select an architect for the new theatre. Ten firms of architects submitted their proposals, from which Canadian Diamond and Schmitt Architects was selected as the winner for its modernist design. The auditorium is modelled after European opera houses, with its five-tiered, horseshoe-shaped auditorium. The COC and its design team attempted to create the best natural acoustics possible, guided by acoustician Bob Essert of Sound Space Design and a team that included Aercoustics Engineering, Wilson Ihrig & Associates, and Engineering Harmonics. The complex took three years to construct at an estimated cost of $181 million.