Schloss Achleiten, Medieval château in Kematen an der Krems, Austria

Schloss Achleiten is a castle in Kematen an der Krems, Austria, featuring architectural elements typical of 18th-century noble residences. The building with its distinctive tower stands where a farmhouse previously occupied the land.

The site began as a castle of the Achleitner family, first named with Bernhard von Achleiten in 1189, held as a fief of Kremsmünster Abbey; Berthold von Achleiten became abbot there in 1219. In 1303 it passed from the abbey to the territorial prince, and from 1377 the Sinzendorfer family held it for over 200 years. Around 1602 the fortified castle was rebuilt as a Schloss, and in 1692 it went to Archbishop Johann Ernst von Thun, who joined it with Hehenberg in an entail dissolved only in 1815.

The name Achleiten comes from the Achleitner family, first recorded with Bernhard von Achleiten in 1189. The castle chapel, damaged by fire, was demolished in 1643; a Maria Opferungskapelle replaced the earlier Leonhardskapelle and holds an altarpiece by Kremser Schmidt. A local legend, the "Teufel von Achleiten", is told about the castle.

The castle sits in a rural area near the Krems river in Upper Austria and can be reached on foot or by car. Visitors should note this is a private, protected building viewable only from the exterior.

The castle's own dairy long produced the strongly smelling Achleitner Schlosskäse, which is now made in Scharnstein instead. A local legend, the "Teufel von Achleiten", is also told about the estate. The round tower by the gate keeps a ring of keyhole slits in its top floor.