Directions:
From the Hôtel de Sens, walk down Rue des Figuiers until it turns into Rue de l'Avé Maria. Turn left onto Rue des Jardins Saint-Paul.The Fortress
To your left, above the basketball courts, you can see the remnants of the medieval fortress built by King Philippe-Auguste in the 12th century, and whose foundations can be seen at the Louvre. You're now facing the largest remaining section of the enormous wall that once surrounded Paris.Interesting Facts:
- The fortress was built by Philippe-August to keep invaders out. It also defined the borders of 12th century Paris. Certain parts of the Marais were excluded from the protection of the king, who banned certain populations, including Jews, from the city.
- Just behind the wall is the famed Lycée Charlemagne. Historical figures such as romantic poet Gerard de Nerval were schooled here.
- If you look down to the far right side of the wall, you can see the remains of two towers, also part of the medieval city.
On the right side of Rue des Jardins Saint-Paul, there are several covered passageways. Go ahead and walk through one of them.

