The Château de Saint-Mesmin, a medieval fortress from the 14th century, is located in the commune of Saint-André-sur-Sèvre. However, the castle bears the name of a commune in the Vendée department , located less than two kilometers away: Saint-Mesmin .

A fiefdom of several families since the 14th century. After a long period of deterioration, the castle was restored in the 1980s and is now the property of a joint syndicate bringing together the departments of Vendée and Deux-Sèvres, which open it to visitors.