Let us return to Paris and to the fifteenth century.
It was not then merely a handsome city; it was a homogeneous city, an architectural and historical product of the Middle Ages, a chronicle in stone. It was a city formed of two layers only; the Romanesque layer and the Gothic layer; for the Roman layer had disappeared long before, with the exception of the Hot Baths of Julian, where it still pierced through the thick crust of the Middle Ages. As for the Celtic layer, no specimens were any longer to be found, even when sinking wells.
Fifty years later, when the Renaissance began to mingle with this unity which was so severe and yet so varied, the dazzling luxury of its fantasies and systems, its debasements of Roman round arches, Greek columns, and Gothic bases, its sculpture which was
