The past thirty years have seen frantic attempts by architects to escape the domination of the "shoe-box" concert hall. Rather than struggle with the inescapable acoustic superiority of this traditional shape, the Casa da Musica attempts to reinvigorate the traditional concert hall in another way: by redefining the relationship between the hallowed interior and the general public outside. The Casa da Musica, the new home of the National Orchestra of Porto, stands on a new public square in the historic Rotunda da Boavista. It has a distinctive faceted form, made of white concrete, which remains solid and believable in an age of too many icons. Inside, the elevated 1,300-seat (shoe box-shaped) Grand Auditorium has corrugated glass facades at either end that open the hall to the city and offer Porto itself as a dramatic backdrop for performances. Casa da Musica reveals its contents without being didactic; at the same time, it casts the city in a new light.