Moulin de Thévalles

Moulin de Thévalles is a historic water mill in Chémeré-le-Roi, in the Mayenne department, standing on the Erve river right below the 16th-century Château de Thévalles. It is the only water mill in Mayenne that visitors can walk through and see running.

Where does the mill stand, and who built it?

The mill sits on the road linking Chémeré-le-Roi and Saulges, close to the well-known Saulges caves, directly beneath the rocky outcrop carrying the château. The building was raised by the lords of Thévalles just below their residence, but the site's milling history goes back much further: two earlier water mills stood here before it, the first one likely dating to the 10th or 11th century, with the earliest written record appearing only in 1260.

What role did the mill play during the Hundred Years' War?

In 1429, while English troops occupied the Maine region, the mill and the neighbouring château came under siege. The local lord, Jean de Thévalles, managed to hold the position and force the attackers to retreat — an episode still remembered as a defining moment in the site's history.

What makes the mill's machinery so unusual?

The mill took its current shape in 1850, when it was rebuilt around an English-type mechanism weighing over 30 tonnes, spread across four floors. Its distinctive feature is the gearing itself, which combines wooden and cast-iron teeth — a rare technical choice in western France. The waterwheel that drives the whole system measures 5.60 metres across and 2 metres wide.

Did the mill do more than grind grain?

Beyond producing flour, the mill also pumped water up to supply the château and, through a dynamo, generated electricity. This kind of multi-purpose setup was common in large rural mills at the turn of the 20th century, which often doubled as the local hub of applied technology.

What is milled at Moulin de Thévalles today?

The mill is closely tied to spelt flour, an old grain once widely grown across the Maine region. Spelt growing in the Erve valley was revived in 1989, and the flour sold on site today comes from organic farming and is ground with traditional millstones.

When did the mill stop working, and how was it saved?

Commercial milling continued until 1958. The building was later restored to keep its historic mechanism operational, and since 1995 it has welcomed visitors during the spring and summer season. Moulin de Thévalles is listed as a monument historique.

What about the Château de Thévalles itself?

The château, overlooking both the Erve valley and the mill, traces its origins to an 11th-century stronghold built to guard against Norman raids. What stands today blends 16th- and 17th-century construction with two surviving 15th-century crenellated towers from the medieval period. Ownership passed through several families over the centuries — Thévalles, Maillé, Condé, La Rochelambert, La Poeze and Vitton de Peyruis. In January 2023, the entire domaine de Thévalles — château, chapel, park and fortifications — was registered as a monument historique.

Frequently asked questions

Can you visit Moulin de Thévalles? Yes — it is the only water mill in Mayenne open for tours, with the mechanism set in motion for visitors during the spring-to-autumn season.

Does the mill still produce flour? The mill sells stone-ground spelt flour made from organically farmed grain grown in the Erve valley.

What sets this mill's mechanism apart from others in the region? Its 1850 English-type gearing mixes wooden and cast-iron teeth, a combination considered unique among mills in western France.

Is the château part of the same visit as the mill? The château sits directly above the mill and the Erve valley, and since 2023 the whole domaine — château, chapel, park and fortifications — has been listed as a historic monument, underlining the site's overall heritage value.

How does the mill connect to the region's wartime history? Both the mill and the château were caught up in the 1429 siege during the Hundred Years' War, when Jean de Thévalles held off the English troops then occupying Maine.