Moulin de Séréac

Moulin de Séréac is a stone tower windmill standing in the commune of Arzal, in the Morbihan department of Brittany, close to the hamlet of Lantiern. Protected as a historic monument since 1937, it ranks among the best-known industrial heritage sites near the Vilaine estuary.

Where exactly is the mill located

Moulin de Séréac stands on the road that carries its name, just south of the RN165 national road, within the commune of Arzal (Morbihan, postcode 56190). The nearest settlement is Lantiern, a small village inside Arzal's boundaries, surrounded by open farmland stretching toward the Vilaine estuary. Sitting on raised ground, as was typical for windmills built along this stretch of the Breton coast, the mill is visible from a good distance around.

The building is a round tower constructed of rubble granite, a form widely used for tower mills along the Morbihan coastline. The date 1653, carved into the stonework, marks the year of construction.

What is the history behind Moulin de Séréac

The mill was built in 1653 as a grain windmill and originally operated as a seigneurial mill — meaning local tenants were obligated to have their grain milled there under the authority of the area's feudal lord. From 1819 it worked in tandem with a second mill on the same site.

The major turning point came in 1905, when the miller fitted the windmill with Berton sails — a more efficient sail system — and raised the height of the tower. From then on the mill operated together with two others, forming a set of three, and increased its milling capacity considerably. Known locally as a "moulin coquetier," it could reportedly produce up to 130 hectoliters of flour per day.

Milling continued without interruption until 1950. Once production stopped, the structure was partly dismantled and converted into a private residence, a fate shared by many Breton windmills during the 20th century as industrial mills replaced traditional wind-powered ones.

Can visitors go inside

Moulin de Séréac is privately owned and is not open to the public on a regular basis. Its owners occasionally open it for guided visits during heritage events, such as the Journées du Patrimoine (Heritage Days). In 2021 the owners marked the mill's 370th anniversary, highlighting restoration work that had brought the building back to a well-kept condition.

Anyone planning a visit should check local cultural listings for Arzal and the wider Morbihan area, since opening dates change from year to year and are usually limited to a handful of days each season.

Why the mill is worth seeking out

Moulin de Séréac is a rare example of a tower mill that has survived in good condition and retained its historic architectural form, despite its conversion into a home. Its listing as a protected monument since 1937 confirms its historical value as a witness to Brittany's pre-industrial rural economy. For travelers exploring Arzal, La Roche-Bernard, or the Vilaine estuary, the windmill makes for an interesting stop connecting the region's rural heritage with its estuary landscape.

Frequently asked questions

Where exactly is Moulin de Séréac located? In the commune of Arzal, Morbihan, on the road bearing its name south of the RN165, near the village of Lantiern.

When was the windmill built? In 1653, according to the date carved into the building's stonework.

Can you visit Moulin de Séréac? It is private property and not regularly open to the public. Guided visits are organized occasionally, for example during Heritage Days.

Is the mill still in operation? No — milling activity ended in 1950, and the building was converted into a private home.

Is the site legally protected as a heritage monument? Yes, it has been listed as a monument historique since August 22, 1937.