Schloss Weißenstein, Medieval castle in Matrei in Osttirol, Austria.

Schloss Weißenstein sits on a limestone cliff at 990 meters elevation and overlooks the Matrei valley from its position on the eastern slope. The structure displays both medieval foundations and later 19th-century additions that altered its original appearance.

The castle first appeared in written records in 1160 under the Counts of Lechsgemünd. In 1207 it passed to the Archbishop of Salzburg, beginning a long period of ecclesiastical control that shaped its development.

The castle's name, Weißenstein, replaced the older name Matrei from the 14th century onward. In the southern tower's ground floor stood the Laurentius Chapel, whose valuable furnishings were stolen by burglars in 1640; remains of frescoes by Simon von Taisten are still visible on the outer wall.

The castle grounds and surrounding park are open to visitors who wish to walk around and explore the exterior spaces. Parking is available in the village center of Matrei, making it convenient to reach the site.

The 1864 historicist rebuild was commissioned by the Viennese architect Franz Poduschka, who bought the castle that year and renewed its buildings and towers following English castle architecture. The hotel use came later, for a few years, until Carl and Else von Thieme acquired the property in 1921.