The particularity of the bell tower of Notre-Dame-de-l'Assomption church in Moustiers-Sainte-Marie to vibrate to the sound of its bells has been reported by several authors including Polydor Virgile who quotes this oscillating bell tower in his book 'Des inventeurs des choses' in 1528. Jacques Gaffarel made the trip to Moustiers following him to see the phenomenon which he described as follows in 'Des curiosités des choses' in 1650 : 'the bell tower whose stones are enclosed at almost the same jig as the bell with so many wonders that those who once climbed to its top without knowing it, when they saw the bells ringing, were not free from fear as it happened to me.'