There is a red door on a little street on the Left Bank that has a special interior. A friend and I were sitting across the street a few years ago and saw a tour group enter and leave. When we asked the waiter about what was inside he gave us the code to get in. I’ve shown photos before of the circular courtyard and how I wonder how the rooms are shaped that face the courtyard. My friend and I decided to enter as we passed and this time, a man was also entering and he let us into the courtyard which is usually blocked by a gate. We were there in the right place at the right time.