Musée de Cluny

The Musée de Cluny houses Europe's finest medieval collection inside a genuine 15th-century mansion that sits directly atop 1st-century Roman baths. The star attraction is the six-panel Lady and the Unicorn tapestries, but the Gallo-Roman frigidarium below is equally impressive-those massive stone arches predate Notre-Dame by over a thousand years. The juxtaposition of Roman engineering and medieval craftsmanship makes this unlike any other museum in Paris.

After the 2022 renovation, the flow is much improved. You start in the Roman ruins, then move upstairs through chronologically arranged galleries showcasing ivory carvings, golden altarpieces, and illuminated manuscripts. The tapestry room is kept deliberately dim to preserve the threads, creating an almost mystical atmosphere around the unicorn scenes. The new medieval garden outside recreates monastery herb plots with plants actually grown in the Middle Ages.

Skip the audio guide-the wall texts are excellent and the space is intimate enough to absorb naturally. The museum gets packed after lunch when Latin Quarter walking tours arrive, so morning visits are essential. Don't rush the Roman baths; most people spend ten minutes there but it's the most historically significant space. The gift shop has surprisingly good medieval history books in English.