In 1960, Le Corbusier began a third religious building, the Church of Saint Pierre in the new town of Firminy-Vert, where he had built a Unité d'Habitation and a cultural and sports centre. While he made the original design, construction did not begin until five years after his death, and work continued under different architects until it was completed in 2006. The most spectacular feature of the church is the sloping concrete tower that covers the entire interior. similar to that in the Assembly Building in his complex at Chandigarh. Windows high in the tower illuminate the interior. Le Corbusier originally proposed that tiny windows also project the form of a constellation on the walls. Later architects designed the church to project the constellation Orion.