The quieter north end of Le Marais is where Maison Proust channels Jacques Garcia (of Hôtel Costes fame) in full Belle Époque mode: jewel-toned velvet, marble bathrooms, moody oil paintings, gold-leaf throughout. Just 23 keys, with multi-bedroom apartments for groups. The La Mer spa can be privately booked; the cocktail bar is theatrical and secretive. Unapologetically Parisian.