So Charles V.'s wall suffered the fate of that of Philip Augustus. At the end of the fifteenth century, the Faubourg strides across it, passes beyond it, and runs farther. In the sixteenth, it seems to retreat visibly, and to bury itself deeper and deeper in the old city, so thick had the new city already become outside of it. Thus, beginning with the fifteenth century, where our story finds us, Paris had already outgrown the three concentric circles of walls which, from the time of Julian the Apostate, existed, so to speak, in germ in the Grand-Châtelet and the Petit-Châtelet. The mighty city had cracked, in succession, its four enclosures of walls, like a child grown too large for his garments of last year. Under Louis XI., this sea of houses was seen to be pierced at intervals by several groups of ruined towers, from the ancient wall, like the summits of hills in an inundation,--like archipelagos of the old Paris submerged beneath the new. Since that time Paris has undergone yet another transformation, unfortunately for our eyes; but it has passed only one more wall, that of Louis XV., that miserable wall of mud and spittle, worthy of the king who built it, worthy of the poet who sung it,-~Le mur murant Paris rend Paris murmurant~.* * The wall walling Paris makes Paris murmur.
In the fifteenth century, Paris was still divided into three wholly distinct and separate towns, each having its own physiognomy, its own specialty, its manners, customs, privileges, and history: the City, the University, the Town. The City, which occupied the island, was the most ancient, the smallest, and the mother of the other two, crowded in between them like (may we be pardoned the comparison) a little old woman between two large and handsome maidens. The University covered the left bank of the Seine, from the Tournelle to the Tour de Nesle, points which correspond in the Paris of to-day, the one to the wine market, the other to the mint. Its wall included a large part of that plain where Julian had built his hot baths. The hill of Sainte-Geneviève was enclosed in it. The culminating point of this sweep of walls was the Papal gate, that is to say, near the present site of the Pantheon. The Town, which was the largest of the three fragments of Paris, held the right bank. Its quay, broken or interrupted in many places, ran along the Seine, from the Tour de Billy to the Tour du Bois; that is to say, from the place where the granary stands to-day, to the present site of the Tuileries. These four points, where the Seine intersected the wall of the capital, the Tournelle and the Tour de Nesle on the right, the Tour de Billy and the Tour du Bois on the left, were called pre-eminently, "the four towers of Paris." The Town encroached still more extensively upon the fields than the University. The culminating point of the Town wall (that of Charles V.) was at the gates of Saint-Denis and Saint-Martin, whose situation has not been changed.