Schloss Schwanberg, Renaissance castle in Bad Schwanberg, Austria

Schloss Schwanberg is a Renaissance castle in Bad Schwanberg featuring a trapezoidal footprint and columned passageways that frame an inner courtyard from every side. The interior spaces are defined by ornamental stucco ceilings created during the early 1700s and the latter part of that century.

A fortress stood here from around 1200, held by the Pettauer family from the 13th to the 15th century. Wilhelm von Galler built a new castle, dated 1581 by a portal inscription. The Styrian province acquired it in 1891; from 1892 it housed a provincial asylum, and in 1941 patients were murdered at Hartheim. A granite stele has commemorated the victims since 2006.

The castle chapel was consecrated in 1778. Its baroque altar holds a painting of the Annunciation signed "P. Bonifaz. Pinxit 1912", restored in 1977. The signature and date let visitors trace how the chapel's furnishing was renewed long after the altar itself was made.

The castle is currently in transition following its closure as a nursing facility in 2015 and subsequent sale for redevelopment. Visitors should check in advance about which areas are open and what visiting hours may apply.

A granite memorial on the grounds since 2006 honors patients from the nursing home period who died at Hartheim Castle during Nazi rule. This connection links the building to an important but difficult chapter in Austrian history.