Input (grade 13): Viollet-le-Duc left copious notes and drawings at his death in 1879, when his pupil Paul Boeswillwald, and later the architect Nodet continued the rehabilitation of Carcassonne.
Output (grade 12): At his death in 1879 his pupil Paul Boeswillwald, and later the architect Nodet continued the rehabilitation of Carcassonne.