Frankenburg, Rock castle ruin in the Südliche Weinstraße district, Rhineland-Palatinate, Germany

Frankenburg is a ruined rock castle on the Frankenfelsen, a 20-metre-long rock platform at 545 metres on the Frankenberg above the Modenbach valley. A rock-cut staircase on the south side leads to the upper ward, where small buildings and a courtyard stood; a short shield wall probably faced northwest. Below the platform, traces show buildings leaning against the rock, separated by a ring wall from the lower ward.

The Frankenburg was first documented in 1327, when Jakob von Ruppertsberg opened it to Count Jofried of Leiningen as part of an Urfehde, a sworn agreement ending a feud. Before 1353 it was held by the lords of Dahn. Buckle-shaped ashlars and pottery finds date its use from the second half of the 12th century to perhaps the 15th century; it was probably destroyed during the 14th century.

The stone work shows the skill of medieval craftspeople who carved stairs and openings directly into the rock face. These details reveal how people of that time shaped their living spaces within the natural stone structure.

You reach the ruins by climbing a set of steps carved into the rock, which can be quite steep in places. Wear sturdy shoes and be prepared for uneven ground throughout the visit.

The rock itself features deep vertical cuts and a wide defensive ditch system carved directly into the stone. These defensive methods were unusual for the period and were specifically adapted to this rock-based setting.