The river Claise, which runs through the middle of Preuilly, isn't very long - only 88km - and isn't very wide, but it is noteworthy for the number of mills it once powered in the Touraine. The development of mills can tell us a lot about history from a technical, scientific, economic, social and landscape point of view.
The history of the harnessing of the hydraulic power of the Claise and its tributaries stretches back at least 8 centuries, with continuous intervention by man on these water courses. The Claise was favoured in this way because, at least in its passage through the Touraine, it has a natural average fall of almost a metre per kilometre, and could therefore support nearly one mill every kilometre. Other rivers in the area, such as the Creuse, Vienne and Loire, are big slow wide rivers, navigable for long distances, but unable to deliver the power needed for many mills.
later converted to a tannery, now a maison secondaire.
Source: L'aménagement hydraulique de la Claise tourangelle et de ses affluents du Moyen-Age à nos jours, and thanks to Jim McNeill for bringing this document to our attention.