followed the Rues Grenier-Saint-Lazare and Michel-le-Comte, traversed the Rue du Temple, and came to a tower erected nearly on the site of the Mont-de-Piété of to-day, between the Rues des Francs-Bourgeois and des Blancs-Manteaux, opposite to the Palais des Archives. Remains of this tower were discovered in 1878, in demolishing some old houses to make way for the enlargement of the Mont-de-Piété; it served to enclose a circular staircase. The wall continued to follow the Rue Francs-Bourgeois to another gate, the Porte Barbette, at the intersection of the Rue Vieille-du-Temple with the Rue des Rosiers; then, beginning to trend south, it followed nearly the Rue Malher to the Place Birague, not far from where the Rue de Rivoli becomes the Rue Saint-Antoine. Here was another gate, the Porte Baudet or Baudoyer. Thence the line of fortification, crossing the locality of the present church Saint-Paul-Saint-Louis, descended to the river in the direction of the Rue des Barres, and ended on the quai, at the Porte Barbel-sur-l'Yeau. Vestiges of this tower were also found in 1878. On the south side of the river the wall was not commenced till 1208, when that on the northern side was completely terminated. Instead of making a close junction with that on the other shore, it took its start somewhat to the eastward of the "corner tower," at the famous Tour de Nesle, on the locality now occupied by the right wing of the Bibliothèque Mazarine and the Hôtel des Monnaies. It crossed the Rue Dauphine and halted on the Rue Saint-André-des-Arts at the Porte Buci; crossed the Boulevard Saint-Germain, where was another gate, the Porte des Cordeliers, afterward Porte Saint-Germain; descended the Rue Monsieur-le-Prince to the Boulevard Saint-Michel, where was the Porte de Fert or d'Enfer, which became the Porte Saint-Michel under Charles VI. From this gateway the wall continued southeasterly to that of Notre-Dame-des-Champs, between the Rue Soufflot and the Rue des Fossés-Saint-Jacques, just south of it, enclosed the Place du Panthéon, crossed the Rue Descartes at the Porte Bordet or Bordel, crossed the Rue Clovis, and traversed the locality at present occupied by the buildings of the École Polytechnique. Continuing in a northerly direction, it reached the Porte Saint-Victor near the present junction of the Rue Saint-Victor and the Rue des Écoles, and finally arrived at the Quai de la Tournelle by following a direction parallel to that of the Rue des Fossés-Saint-Bernard.