 The Grand Théâtre and the Théâtre du Quai are the venues of three institutions, "Angers-Nantes Opéra", an opera company also based in Nantes, the Contemporary Dance National Center (CNDC), inaugurated by Alwin Nikolais in 1978, and the "Nouveau théâtre d'Angers" (NTA).The Orchestre National des Pays de la Loire, shared with Nantes, usually performs at the Congress Center, built in 1983, with a capacity of 1,240 seats.Other concert halls include the "Chabada", the "Amphitéa" and the former Ursuline chapel.