Rue Jean-Jacques Rousseau, in the days when its upper part was the ancient Rue Platrière, the lower Rue Grenelle-St-Honoré, counted among its inhabitants Rousseau, Bossuet, Marat, Fragonard, Boucher, the duchesse de Valentinois, and other noted personages. Most of the ancient dwellings have been replaced by modern constructions. Where the General Post Office now stands, extending down Rue du Louvre, the comte de Flandre had a fine mansion in the thirteenth century. Destroyed in 1543, it was replaced by another fine hôtel, which became the Paris post office in 1757, rebuilt in 1880. We see interesting architectural traces of past days at Nos. 15, 18, 19, 20, 33, 56, 64, 68. This brings us to Rue Étienne-Marcel, its name recalling the stirring and tragic history of the Prévôt de Paris at the time of the Jacquerie-Marcel, in revolt against the Dauphin; Charles V had the two great nobles, Jean de Conflans and Robert de Clermont, killed in the King’s presence, and was himself struck down dead when on the point of giving Paris over to Charles-le-Mauvais in 1358. But the name only is ancient, the street is entirely modern, cut across the line where ancient streets once ran. Some few old-time vestiges remain here and there, notably the Tour de Jean Sans Peur at No. 20, all that is left of the hôtel de Bourgoyne, built in the thirteenth century, to which the tower was added in 1405; it was partially destroyed in the sixteenth century, while what still stood became a theatre, the chief Paris play-house, the cradle of the Comédie Française. Rue Montmartre, crossing Rue Étienne-Marcel and going on into the arrondissement II, dates at this end--its commencement--from the close of the eleventh century. In Revolution days it was known as Rue Mont-Marat! As long as Paris had fortified boundary walls there was always a Porte Montmartre, moved northward three times, as the city bounds extended. The Porte of Philippe-Auguste was where the house No. 30 now stands, and this part of the street was known then as Rue Porte-Montmartre. The Passage de la Reine de Hongrie memorizes a certain _dame de la Halle_ in whom Marie-Antoinette saw a remarkable likeness to her mother, the Queen of Hungary. The woman became for her generation “la Reine de Hongrie”--the alley where she dwelt was called by this name. She shared not only the title but the fate of royalty: was beheaded by the guillotine.