Le Bas-Plessis was originally an ancient fiefdom and lordship under the jurisdiction of Montrevault. In the 15th century, it belonged to the Chenu family, who obtained it through the marriage between the knight Pierre Chenu and Jeanne Bérard, lady of Bas-Plessis, the daughter of Jean Bérard and Gervaise de Marigny.
Pierre Chenu, a knight of the Order of the King, obtained on December 23, 1602, the right to establish the land as a chatelain with the right of provostship, seal, measurement, baking oven, and mill. This right was granted to him by his suzerain, Charles Turpin, Count of Montrevault.
On November 2, 1666, François de Villoutreys and his wife, Renée Chenu, took possession of it.
During the Vendée War, the castle provided refuge to the wounded Lescure. In 1794, the feudal castle was set on fire during a battle, and only two towers remained, bordering the current pond. The castle was rebuilt in a neo-classical style in 1845 and expanded with a wing in 1875 to house the library of the Marquis de Villoutreys.
The remains of the medieval castle consist of two round towers with conical slate roofs. The first floor of the north tower serves as a chapel. A curtain wall connects these two towers. These are the parts that are listed as historical monuments.
The Pilgrimage Church of Wies (Wieskirche) is an oval rococo church, designed in the late 1740s by Dominikus Zimmermann. It is located in the foothills of the Alps in the municipality of Steingaden.
The sanctuary of Wies is a pilgrimage church extraordinarily well-preserved in the beautiful setting of an Alpine valley, and is a perfect masterpiece of Rococo art and creative genius, as well as an exceptional testimony to a civilization that has disappeared.
The hamlet of Wies, in 1738, is said to have been the setting of a miracle in which tears were seen on a simple wooden figure of Christ mounted on a column that was no longer venerated by the Premonstratensian monks of the Abbey. A wooden chapel constructed in the fields housed the miraculous statue for some time. However, pilgrims from Germany, Austria, Bohemia, and even Italy became so numerous that the Abbot of the Premonstratensians of Steingaden decided to construct a splendid sanctuary.