 The oldest surviving house in Paris is the house of Nicolas Flamel (1407), located at 51 Rue de Montmorency.It was not a private home, but a hostel for the poor.The major crossroads of medieval Paris was the intersection of the Grand-Rue Saint-Martin and the Grand-Rue Saint-Honoré; under Philip II, these were also among the first streets in the city to be paved with stones.