Sainte Marie de La Tourette

Le Corbusier, 1960. A Dominican priory on a slope at Éveux, outside Lyon, and the photo shows the trick: the ground falls away while the building stays level, so the friars' cells along the top floors sit in a concrete box carried on thin columns over the hillside. The rough concrete and the rhythmic glazing panels, worked out with the composer and engineer Iannis Xenakis, made it a pilgrimage site for architects. It is still a working monastery, and it was added to UNESCO's World Heritage List in 2016 alongside the Marseille block.