Moulin de Sannois

Moulin de Sannois is an 18th-century windmill standing on top of the Mont Trouillet hill in Sannois, roughly 15 kilometres northwest of Paris. It is a rare example of a pivot mill and, according to specialists, the most significant surviving structure of this kind in the entire Île-de-France region.

Where does this mill come from?

Construction was completed in 1759 at the initiative of François Roger, a wine grower from nearby Franconville. The mill remained in active use grinding grain for local residents until 1866. When it later faced the risk of ruin, its last owner donated the building to the town of Sannois in 1938 specifically to save it. Since then it has gone through several restoration campaigns, the largest of which took place between 1976 and 1979 and returned the mechanism to working order.

How does a pivot mill actually work?

What sets Moulin de Sannois apart from a classic Dutch-style windmill is how it turns to face the wind: the entire structure rotates around a central axis, rather than just its cap. That axis, carved from a single piece of three-hundred-year-old oak, stands six metres tall. The whole mechanism weighs more than forty tonnes. Wind driving the sails is converted into mechanical force that crushes grain between two millstones — a traditional process, preserved here in unusually complete form.

Why climb Mont Trouillet at all?

The mill sits at an altitude of 162 metres, on top of a hill that has served as a natural viewpoint over the Seine valley and the Montmorency valley for centuries. From up here, the view stretches out towards Paris, while a ridge of wooded hills lines the opposite side of the Montmorency valley. That panorama, as much as the mill itself, is what draws many visitors up the hill.

What is the mill's connection to art?

The windmills of Sannois, including this one, were a recurring subject for painter Maurice Utrillo during his stay in the town in 1912 and 1913. He captured the surrounding rural landscape on canvas repeatedly during that period, which today adds an extra artistic layer to a visit.

How and when can you visit?

Moulin de Sannois stands at 26, rue des Moulins and is reachable by local bus. The site has been listed on the supplementary inventory of historic monuments since 1975, and the mill together with the miller's house also carries additional protection as a site of artistic and picturesque character. Individual visitors can tour the mill on the first Sunday of the month, from April to October (excluding July and August), between 2pm and 7pm. Groups of at least ten people can arrange a visit on weekdays by prior booking. Inside, a small collection of objects related to flour production documents the traditional milling craft. It's worth knowing that, aside from the mills of Montmartre, this is currently the last operating pivot mill in the greater Paris region — making it a rare piece of both technical and historical heritage.

Frequently asked questions

Is the Sannois mill still operational? Yes. The mechanism has been restored and is in working order — it is one of the last functioning pivot mills in the Paris region, alongside those in Montmartre.

When can I visit without joining a group? On the first Sunday of every month, from April to October (excluding July and August), between 2pm and 7pm.

Can I get there without a car? Yes, the mill at 26, rue des Moulins in Sannois is served by the local bus network.

What makes this mill so unusual? It is a rare pivot mill, considered the most important of its kind in Île-de-France, with a six-metre pivot axis cut from a single piece of three-hundred-year-old oak and a total weight of more than forty tonnes.