On Friday, a nun gave warning that the Chapel of Ronchamp, considered by many to be one of the key architectural works of the last century, had been vandalized. When police arrived on the scene, they found signs of forced entry: a stained-glass window, one of many executed by Le Corbusier, was broken and a concrete trunk was missing. As Le Monde reports, the intruders had also attempted to gain entry via a door. The overall damage was, according to some, “priceless” because the stained-glass had borne an original illustration by Le Corbusier. An initial assessment from the department of historical monuments found the window to be irreparable.