Two islands were reunited to create this one: l'Ile aux Vaches and l'Ile Notre Dame. It was urbanised at the XVIIth century. From the bridgt you can walk aroung the island on the left and on the Quai de Bourbon where you can see the beautiful hotels at numbers 15 and 19. The famous litterature circles of the Marquise de Lambert took place at #27 quai d'Anjou, and #17 there is the Hotel de Lauzun, built in 1657. Its inside decoration is beautiful. Baudelaire and Theophile Gautier used to spend a lot of time there! Nowdays many famous French people live on the island.
At the bottom of the docks you can take the St Louis en l'Ile street to the St Louis church, easily identified thanks to the metallic clock. Its construction started in 1664 and ended in 1726! Of Gothic style, the inside decoration is rich and beautiful, a good example of the French classicism.
The perforated tower of the clock, which was built only in 1765, makes the original point of the Ile Saint Louis.
Among the old shops you should not miss the Bertillon shop and its famous sorbets, known as "the best in Paris". You can see the old site of the archeveche, go to the quai d'Orleans and the Ile de la Cite, via Bude street on the left.