Rotzberg Castle

Rotzberg Castle ruin stands in Ennetmoos, Switzerland; the identity of its original builders is not known.

The hill has a long record of human use. Prehistoric pottery was recovered beneath the site, and medieval finds dated to the 10th through 12th centuries attest to activity in the early Middle Ages. In 1150 the Freiherr von Rotenburg conveyed large tracts around Stans and Ennetmoos to Murbach‑Lucerne Monastery, and it has been proposed that he may have established a fortified seat on those lands to manage them. A 1197 document records the place-name Rozziberg as owing dues to Engelberg Abbey; because fortresses were normally exempt from such levies, this entry has been taken by some to imply the fortification post‑dates that year.

The enclosing wall of the site is usually dated to the 12th century, and the internal timber buildings were probably replaced by masonry between about 1210 and 1230. The White Book of Sarnen, compiled around 1470, lists Rotzberg among the castles said to have been destroyed during the Burgenbruch uprising against Habsburg reeves near 1308. Aegidius Tschudi gives a dramatic version placing the capture on New Year’s Day 1308 and describes entry aided by a rope and a serving maid. Archaeological investigation has not produced evidence of a violent destruction. The stronghold was likely abandoned by the end of the 1200s, with some proposals suggesting abandonment as early as 1239.

After the medieval period the hilltop saw varied uses. During the 17th and 18th centuries the summit served as a hermitage. On occasions of military threat it functioned as a lookout, notably during the 1798 French invasion and the 1847 Sonderbund War. In the 19th century a guest house was erected within the old courtyard, with reported construction dates of 1864 and 1872. Plans in the early 20th century to develop a hotel, including a proposed funicular, were not carried out. In 1910 the Swiss federal government bought the property for CHF 18,000 and had conservation work completed before declaring it a protected heritage site. The location is entered in the federal inventory as KGS‑Nr. 4178, a category B object under monument protection. Trial excavations were undertaken in 1988. In 2010 the federal authorities carried out repairs and cleaning of the ruins, and in 2015 they announced an intention to transfer responsibility for the site to the Canton of Nidwalden.