• Panorama terrace closed for now, so the visit is the nave and crypt only; skip it if you came for the rooftop view
• Strollers allowed, with an outside ramp and an inside lift to the whole nave; scooters, helmets and food are not
• Last entry 45 minutes before closing, and on the first working Monday of each month it opens at noon

The Panthéon is a domed 18th-century monument on the Montagne Sainte-Geneviève, designed by the architect Soufflot. Under the dome, Foucault's pendulum swings on a 67-meter wire, its path slowly shifting as the Earth turns.

Below the nave, the crypt holds the tombs of Victor Hugo, Marie Curie and other figures France chose to honor. Best for school-age kids curious about science or history.