A Unesco World Heritage Site, this lavish former archbishop’s residence, redesigned in neoclassical style between 1671 and 1710, was where French princes stayed before their coronations – and where they threw sumptuous banquets afterwards. Now a museum, it displays truly exceptional statuary, liturgical objects and tapestries from the cathedral, some in the impressive, Gothic-style Salle de Tau (Great Hall). Treasures worth seeking out include the 9th-century talisman of Charlemagne and St Rémi's golden, gem-encrusted chalice, which dates from the 12th century.