Clisson valley is lying in a remarkable site where the rivers Sèvre Nantaise, Maine, Moine and Ognon are flowing. In the bottom of steepy valleys, they become like torrents which hydraulic strength has been used for a long time by water mills and factories. Upon the rivers were built dams called « chaussée » (carriage way) Some of those were equipped with water mills at their extremities.The paper, flour and fullers’ mills that lie on the banks of the Sèvre Nantaise bear witness to the Valley’s prosperous industrial past. Thanks to the blend of Italian and Clisson influences, the colours of Tuscany are reflected in this charming river. 17 old water-mills have been registered along the river Sevre in our valley. They bear the testimony  of the development of the hydraulic power from the XIII C onwards.