Schallenberg Castle, Castle ruin in Kleinzell im Mühlkreis, Austria

Schallenberg Castle is a ruined hilltop castle on a long rock spur at 434 m above sea level, set in a tight bend of the Große Mühl. Two deep section ditches cut into the rock still guard the approach from the southeast. The surviving masonry is a 2 by 3 metre standing wall about 1.5 metres high, made of well-worked stones and now overgrown.

The stronghold was built around 1231 as a property of the Passau Prince-Bishopric and first appeared in written sources through a donation to the Cistercian abbey of Wilhering in 1260. Early documentation establishes its importance as a strategic fortification in this region.

The castle represents a time when fortifications controlled trade routes and travel through the Mühlviertel region. It shows how important such strongholds were for people who used the river and traveled these ancient paths.

The site can be reached via an unmarked trail that visitors must carefully seek out to locate the historical remains. Good preparation and a sense of direction are helpful for reaching this remote location.

The family crypt of the Schallenbergs is preserved in the St. Josef Cemetery Chapel in Niederwaldkirchen and connects the history of the castle with its inhabitants into the present day. This place of remembrance shows how the family remained linked to the region across generations.