Bevergern Castle, Medieval castle ruins in Hörstel, Germany.

Bevergern Castle is a fortification in Hörstel, with only the foundation walls visible today in the village center. The preserved remains show the spatial layout of a medieval military structure and reveal its original ground plan.

Two theories date the castle's origin: the first half of the 12th century under the Bishop of Münster, or the 14th century under the Count of Tecklenburg. On 25 October 1400 Count Nikolaus II of Tecklenburg ceded it to the Bishop of Münster. From December 1535 to January 1536 the Anabaptist Jan van Leiden was imprisoned here. In March 1680 Bishop Ferdinand II of Fürstenberg had it blown up.

The castle site lies in the centre of Bevergern, a farming town, and its buried foundations are marked out at ground level in the old town. The Anabaptist Jan van Leiden was held here from December 1535 to January 1536 before his execution in Münster.

The site is freely accessible and located centrally in the village, making it easy to visit. The foundations are at ground level, so no special footwear is needed and visitors of all ages can explore the site.

Archaeological excavations in 1910 uncovered sections of the original foundations hidden beneath buildings in the old town. These discoveries helped expand understanding of the medieval structure's extent and layout.