Les quatre moulins

Les Quatre Moulins is a cluster of watermills in Fougères, a town in the Ille-et-Vilaine department of Brittany, standing on the Nançon river right beneath the walls of Fougères Castle.

Where are the Quatre Moulins and what are they?

The name "Les Quatre Moulins" (the Four Mills) refers to a group of watermills built on the Nançon, just a few meters from the entrance to the medieval fortress. The ensemble is also sometimes known as Moulin de la Tranchée. The Nançon runs with a notably steep gradient at this point, and that natural drop in the riverbed is exactly why several mill installations clustered together at the foot of the castle over the centuries.

How far back does the site go?

Mills on the Nançon are documented from as early as the 11th century, when the river's fast current was first harnessed to drive machinery. The function of the mills expanded over time: grain milling for flour came first, followed by tan mills that ground oak bark for the town's tanners, and fulling mills that processed hemp and linen fibers for cloth-making. From the 15th century onward, papermaking was added to the site, marking a further stage in its life as a hub of water-powered craft.

What was the mills' connection to the castle and the Lords of Fougères?

The proximity to the fortress is no coincidence. The Quatre Moulins complex is considered to have been the banal mill of the Lords of Fougères — a mill subject to milling rights, meaning residents of the surrounding lands were required to have their grain ground there, generating revenue for the castle's lords. That role is suggested both by the mills' location, literally a few meters from the castle gate, and by the presence nearby of a banal oven, a communal bread oven governed by the same obligation.

What should visitors know when exploring the site?

For anyone visiting Fougères Castle — one of the largest medieval castles in Europe — the area around the Quatre Moulins is a natural extension of the visit. Walking along the Nançon at the foot of the ramparts, it's easy to picture how, for several centuries, this modest stretch of river powered a whole chain of local crafts: grain turned into flour, hides processed for tanners, cloth fulled for weavers, and eventually paper produced on site. It's a good illustration of how a medieval fortified town functioned not only as a military stronghold but also as a living center of production and trade.

It's worth noting that the name "four mills" is not a figure of speech — 18th-century records, from 1729 and 1772, confirm the existence of exactly four mills in this part of town, which is how the site got its lasting name.

Frequently asked questions

Is Les Quatre Moulins a single mill or several buildings? It's a cluster of several watermills on the Nançon river, not one single structure — the name literally means "four mills," and 18th-century records confirm that four installations operated at the site.

How were the mills connected to Fougères Castle? The complex is considered to have been the banal mill of the Lords of Fougères — local residents were obliged to use it, and its proximity to the fortress, together with the nearby banal oven, supports this role as an economic asset controlled by the castle's lords.

What was produced at the Quatre Moulins? Over the centuries the mills ground grain into flour, crushed bark for tanners, fulled linen and hemp cloth, and from the 15th century onward also produced paper.

Since when have mills stood at this spot on the Nançon? The use of the Nançon's steep gradient to power mills dates back to the 11th century, making it one of the oldest elements of Fougères' industrial heritage.