Oratoire du Louvre
What it is: Oratoire du Louvre
Where it is: 145, rue Saint-Honoré – 1e (map)
When to see it: Sunday – 9:30 AM to 10:30 AM (before the service) and By appointment
How to get there: Louvre-Rivoli M1 or Palais-Royal – Musée du Louvre M1, M7