Steinsberg Castle, Castle ruin on hilltop near Ardez, Switzerland.

Steinsberg Castle is a castle ruin on an elevated plateau near Ardez, featuring a four-story keep and sections of the original ring wall. The stone structures remain clearly visible across the site and show the medieval fortification's typical defensive layout.

The castle was built as a medieval fortification in a strategic location and changed ownership several times throughout the centuries. A major turning point came in 1499 when imperial troops attacked and burned it during the Swabian War.

The Church of St. Luzius, now a ruin, was abandoned during the Protestant Reformation. Its nave runs north-south rather than toward the east, and the north and west walls, the choral arch and part of the apse still stand beside the castle entrance.

To reach the castle ruins, visitors follow a marked path from Ardez village leading up to the plateau. The walk is moderately steep but the path is reasonably well-maintained and leads directly to the site.

The keep's upper stories hold window seats from the 14th century, either added then or part of a rebuild. A change in stone size above the second story hints at repairs after damage. Look for a roughly 50 cm setback in the masonry at the first floor.