In order to meet the demands of major architectural projects such as the cathedral and the bishop's palace, master builders had the best ashlar quarried as close as possible to their construction sites. Beauvais' unique geological environment meant that the quarries had to diversify to meet demand.

By Jean-Pierre GÉLY, geologist, research associate at the Laboratoire de médiévistique occidentale de Paris (LAMOP, University of Paris I - Panthéon-Sorbonne)

Free admission without reservation