“In Vieux Nice, Hôtel du Couvent, a Luxury Collection, reimagines a 17th-century convent as a serene, sunlit retreat of cloisters, stone vaults and fragrant gardens. Calming rooms feel monastic-chic. Linger at the spa and pool, dine Mediterranean, then wander to Cours Saleya, the Promenade des Anglais, beaches, and pastel lanes.”