Burg Nieder-Modau

The castle occupies the summit of the Schlossberg, a conical hill of about 280 metres with the Modau river turning around its steep western flank and the Rohrbach running to the east. The fortification is a classic hilltop site with an elliptical encircling stone wall aligned roughly southwest to northeast and defended by a deep external ditch. The ditch has been measured around a circumference of 265 metres and the area it enclosed is reported as just over 5,000 square metres; nineteenth-century measurements recorded the longer ellipse axis at 284 feet and the shorter at 184 feet, with the ditch standing about 20 feet deep relative to the wall side.

Foundations on the plateau indicate the positions of several internal buildings and a round masonry foundation interpreted as the base of the bergfried, the central defensive tower. A central hollow in the plateau corresponds to that tower location. Structural traces include fired (burnt) clay, hollow bricks and carefully worked sandstone blocks, which match a building pattern of timber-framed superstructures set on stone foundations. Charred beam fragments and widespread burn marks on foundation remains document destruction by fire.

Archaeological finds recovered from the castle plateau reflect its military and domestic life. Metal lance and arrow tips have been recorded alongside numerous stone projectiles described as stone-shot from siege engines (Bliden), including a partly destroyed granite projectile and other assorted basalt stones. Animal bones of fallow deer, roe deer, pigs, hares and small birds were also found and are interpreted as evidence of the hilltop settlement’s diet in the medieval period.

The site survives today as a ruin and prominent landscape feature. Sections of the encircling wall still rise above ground in places, and the earthworks of ramparts together with the southern approach remain clearly visible in the terrain. Many wall fragments were removed in the nineteenth century and the interior masonry was quarried for building stone, while nineteenth- and twentieth-century landscaping interventions — including the planting and later removal of trees — altered the immediate surroundings. An entrance reported to lead to an underground passage toward the Old Castle Mill is part of the recorded remains and the mill itself appears in records from 1486.