Palace of the Popes, Avignon, UNESCO World Heritage Site, Vaucluse, Provence-Alpes-Cote d'Azur, France, Europe

palace popes avignon unesco world heritage site vaucluse provence alpes cote d'azur france europe stone staircase hall medieval castle vaulted ceiling arch wall window light hallway history architecture grand ancient structure building historic landmark travel destination europe france monument interior explore pathway stonework gothic romanesque fortress turret tower brick exploration vintage heritage heritage site historical