Watermolen van Heks

Watermolen van Heks is a historic watermill in the hamlet of Heks, part of the municipality of Heers in the Belgian province of Limburg. The mill sits along the Herkebeek, a small stream whose flow has shaped the character of this site and powered its machinery for centuries.

Where does the mill's history begin?

The story of the mill goes back to the 12th century. In 1174, Countess Agnes of Loon donated the Heks estate to the Cistercian monks of the Abbey of Villers, who took over management of the land. The monks quickly recognized the potential of the local stream — records from as early as 1282 describe work carried out to divert the Herkebeek specifically for the construction of a mill. This makes Watermolen van Heks one of the oldest documented water-powered industrial sites in the region.

How did the mill work in its early days?

Originally, the site functioned purely as a grain mill. The engineering behind it was clever: water was kept at a high level along the edge of the valley and then redirected back down at the mill itself, creating a substantial drop. This artificial fall gave the water wheel far more driving force than the stream's natural, gentle course through the valley would otherwise have provided.

How has the building changed over time?

The current structure was built before 1775 — it already appears on the Ferraris maps from that year, labeled as the Hex Molen. The core of today's building, which combines a residence with the mill house itself, actually dates a little earlier, to the late 17th or early 18th century. This layered construction history shows that the site was repeatedly rebuilt and adapted by successive owners while its industrial function remained unbroken.

What other purpose did the mill serve besides grinding grain?

Toward the end of the 19th century, likely after 1884, the mill took on an unexpected additional role: pumping water. A pump installed at that time was designed to carry groundwater across a distance of roughly 300 meters and up a height difference of about 50 meters, supplying water to the nearby Castle of Heks. It was an unusual technical solution for its era — using the mill's water power not only to grind grain but also to feed the water supply of a nearby residence.

What protected status does the site hold today?

Watermolen van Heks is recognized as a valuable piece of the region's architectural and landscape heritage. On July 13, 2005, both the mill and its surrounding rural landscape were officially granted protected monument status. Thanks to this recognition, the unique combination of history, engineering, and architecture found here has been preserved as a testament to traditional milling craft and inventive use of water power.

Frequently asked questions

Where is Watermolen van Heks located? The mill stands in the hamlet of Heks, in the municipality of Heers, in the Belgian province of Limburg, along the Herkebeek stream.

Who built the mill at Heks? Its origins trace back to the Cistercian monks of the Abbey of Villers, who received the Heks estate in 1174 and were already diverting the local stream for a mill by 1282.

What did the mill do besides grinding grain? From the late 19th century onward, it also powered a pump that carried groundwater to the nearby Castle of Heks, over a distance of about 300 meters and a height of 50 meters.

Is the mill legally protected today? Yes, since July 13, 2005, both the mill building and its surrounding rural landscape have held protected monument status.