Note 23 — LECTURE III. The Transition.
Reading edition
The carving of the more advanced style here described belongs probably to the beginning of the thirteenth century. M. Viollet le Duc seems to think that the western façade was not begun till about 1218; but I think it must have been earlier, because the corbels and upper jamb-stones of the south-western portal, unlike the rest, are of exquisite Byzantine workmanship. (G. G. S. 1878).