Burg Milseburg, Medieval castle ruins in Kleinsassen, Germany

Burg Milseburg is a castle ruin perched on a steep hillside in Kleinsassen at roughly 613 meters elevation. The surviving fieldstone walls measure about 1.20 meters thick and reveal how the fortress was originally built.

The fortress first appeared in documents from Emperor Otto II in 980 and served as a border marker between Fulda Monastery and Hünfeld territory. This strategic location made it an important control point in a region contested by different powers.

The name Liedenküppel, used alongside Burg Milseburg, survives in local usage and on maps of the hill. The Franconian von Milz family appears in early charters of Fulda Abbey and also held Haselstein Castle as a fief. Visitors can still make out the circular hollow of the neck ditch on the southeastern approach side.

Reaching this site requires sturdy hiking boots because trails circle the hillock from three sides without direct access routes to the top. The walk is moderately challenging but offers several starting points from different directions.

The 21 by 24 metre figure is the footprint of the whole small castle, not of its tower. The ring wall was built entirely of fieldstones, with smooth, mortared stones on the inner face; a section about 50 cm high with a breach survives and is roughly 1.20 m thick. The only solid building inside was a residential tower, and its hollow is still visible as a depression on the summit.