Schloss Mannsberg

The site comprises two linked strongholds on a wooded ridge, formed and used across medieval and later periods. The principal castle occupies the highest point of a southern ridge spur at about 691 metres above sea level, while roughly 200 metres to the south and at a much lower level stand the ruins of a smaller lower castle on a rock outcrop. Stone construction is the dominant technique across both locations, with successive building phases visible from medieval through Renaissance and early modern interventions.

At the main hilltop fortress a polygonal defended enclosure crowns the ridge and is protected by a tall surrounding wall. Within this enclosure the main residential block rises in four storeys and dates to the 14th century; its walls are largely built of medieval stonework associated with fortified dwellings. In the mid-16th century an irregular wing was added on the west side with arcaded elements facing an inner court. Around the main enclosure a lower and quite spacious outer ward occupies three sides, reflecting building phases from the medieval period into the Renaissance. On the eastern approach a three-storey gate tower stands connected to the inner dwelling by an enclosed defensive passage, and a well sits before the principal residential block. East of the main mass a small clerical house was constructed in 1627. Interior fittings survive from the 1500s to the 1700s, including stucco decoration in the chapel dated 1711, a late Baroque stucco ceiling from about 1730, and a third-floor timber ceiling bearing the Khevenhüller-Stubenberg arms; the main castle survives in a largely preserved and restored condition following 19th- and late 20th-century work.

The lower castle, known as Altmannsberg, occupies a rocky head about 200 metres south of the main site and was likely built in the same broad period as the upper stronghold. Its plan is irregularly hexagonal and its original perimeter wall rose two storeys, constructed in stone at a thickness of about 1.30 metres. At ground-floor level the wall provided a narrow, round-arched gate and numerous narrow arrow slits for defence. Remains in the northeast mark the base of a four-storey keep. In the 13th century a residential wing was inserted into the courtyard and the surrounding wall was heightened by two additional storeys, alterations that indicate continued habitation into the late Middle Ages. By 1688 the lower castle was recorded as a narrow but tall tower in a ruined and abandoned state; today only its masonry remains and the footprints of those phases are visible.