The medieval city, Avignon, is the main city of the department of Vaucluse. The inner part of town is still encircled by its 5 km long fortification walls with its 39 towers and 7 gates. Avignon has a great many attractions. The greatest sight is without any doubt the majestic Palace of the Popes: www.palais-des-papes.com; www.mairie-avignon.fr/en/musees/palaisen.php, which overlooks the Rhône river. Because of unrest and anarchy the Popes preferred Avignon to Rome for almost one hundred years (1309-77). Another of Avignon’s famous sights is Pont St-Benezet, immortalized in the children’s’ song Sur le Pont d’Avignon.