Le Corbusier, Notre Dame du Haut  (1955) 

What looks like an abstracted cottage from a distance, with whitewashed walls and a strangely curved roof, becomes an architectural epiphany up close. Le Corbusier’s magnificent design—from the bent roof that creates a natural fountain when it rains, to the overall sculptural form—make it a celebrated outlier in his career. A wall with small slits and squares cut for light produces a glittering, spiritual calm when viewed from inside. 

Photo courtesy Wikimedia Commons  Photo 4 of 10 in 10 Inspiring Modern Churches