Residing beneath Paris’ medieval city walls in an 18th-century staging post, Le Petit Paris has been giving shelter to travelers and bohemian artists for more than a century. The rooms, decorated by celebrated interior designer Sybille de Margerie, offer a journey through the various epochs, from the Middle Ages to the ’70s. Such trends, combined in a sophisticated blend, also provide inspiration for the breakfast room, which opens out onto an airy patio.