Île-de-France, France

Built to house a relic of the True Cross brought from Spain in 542, this church was so powerful in the Middle Ages that it became a town within a town. It is one of very few Romanesque churches in Paris.

When the Louvre was still a royal palace, this was its church. It accordingly drew an assortment of royalty, courtesans, men of art and law, and local artisans.

This church stands on the site of an abbey founded by Clovis and dedicated to Geneviève, the patroness of Paris. It still receives pilgrims today.

Now part of the National Museum of the Middle Ages (Cluny Museum), these ancient Roman baths in the heart of Paris date from the 1st through 3rd centuries and are exceptionally well preserved.

This Neoclassical church was originally part of an abbey dedicated to St. Genevieve, but since the 18th century it has served primarily as a burial place for French heroes.

The most famous cemetery in France, this is the final resting place of Abelard and Héloïse, Chopin, Moliére, Oscar Wilde, Delacroix, Balzac, Jim Morrison and more.

Housed in a spectacular modern building, the Paris Institut du Monde Arabe explores France's long relationship with the Arab world and provides insights into Arab-Islamic religion, philosophy and politics.

The most fashionable church in 19th-century Paris, this basilica dedicated to a saintly French queen is best known for its imposing twin spires.

Dedicated to St. Mary Magdalene, this Neoclassical church was originally designed as a temple to the glory of Napoleon's army.

This excellent museum traces the history of Jewish art, culture and religion in France and Europe.