This enormous concrete cone (1964-1976) by architect Edgar de Oliveira da Fonseca has had its fair share of controversy. The edifice stands at a height of 106m with a 96m internal diameter. The cathedral's main door (18m high), adorned with bronze bas-reliefs, leads into the immense interior space, entirely devoid of any structure, which can hold some 20 000 people. At each cardinal point is a huge stained-glass window sloping down from the summit to the base. In the basement is a museum devoted to sacred art and a columbarium.