The Louvre will still be there. Spend the daylight on stained glass, staged taxidermy and a market older than the Revolution.
Sainte-Chapelle
1,113 stained-glass panels on the Ile de la Cite, best in morning light. Around 22 euros, and you must book a slot.
Musée de la Chasse et de la Nature
Two Marais mansions of taxidermy staged as surrealist art, at 62 rue des Archives. Tue to Sun 11-6, closed Mondays.
Marché des Enfants Rouges
The city's oldest covered market, trading since 1615 at 39 rue de Bretagne. Tue to Sun; arrive at noon and eat well.
Atelier des Lumières
A former iron foundry at 38 rue Saint-Maur where whole painters get projected wall to wall. Shows rotate by weekday.
Rodin's garden, not the house
Three hectares at 77 rue de Varenne holding The Thinker and The Gates of Hell. A garden-only ticket costs far less.