19 Rue Saint-Louis en l'Île
- Sightseeing: "This church was first known as l'Eglise Notre-Dame-en-l'île but was rebaptized Eglise St.-Louis-en-l'Île in 1634. It is one of the smallest parishes in Paris. But its history is rich, Saint François de Sales once preached in these hallowed halls and the young Bonaparte, so it's said, once knelt in prayer here."
- Best for Sightseeing Because: The church dates to the early 17th c. and its central role, and position, on the historic and picturesque Île-St.-Louis make it a worthy destination.