A small cathedral chapel on the territory of the Royal Palace. It was originally created to store holy relics that were exported during the Crusades. We were delighted with the beautiful stained glass windows describing various scenes from the Bible. It's insanely beautiful. The chapel is connected to the palace by a gallery.
It's very beautiful, you can buy a concert ticket (they sell it in a tobacco shop across the street), then you can see the church without queuing and listen to music.
The stained glass windows are of fantastic beauty. A must-visit place. If you plan to watch the Concierges, it is better to take a shared ticket at the Concierges ticket office and then go to the chapel without queuing.