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 palace popes avignon france tourists hallway vaulted ceiling stone floor windows light shadows grand architecture history travel destination sightseeing europe medieval historical building landmark culture art museum visit explore walk inside interior room space