Schloss Thürn, Wolfsberg, Medieval castle in Wolfsberg, Austria

Schloss Thürn stands on the eastern slope of the Saualpe west of Siegelsdorf in the Wolfsberg municipality. Its two-storey Palas on the south side has an east-facing oriel resting on figurative Gothic corbels carved with the Reisberg coat of arms. The adjoining square tower, 14th-century in core, carries a tent roof crowned by a small onion dome; the round tower to the northeast is the former bergfried, and the old drawbridge gate stands west of it.

Schloss Thürn was first documented in 1243 as the property of Wülfling von dem Thurn. It passed to the Lonsperger family in 1372, and Amelreich von Eibiswald enlarged the building between 1580 and 1590. In 1675 Archbishop Max Gandolf von Kuenburg of Salzburg bought it and gave it to the cathedral chapter of St. Andrä in 1679. The Jesuits held it from 1859 to 1916.

The northeast tower chapel shows how noble families used the castle to display their wealth and power over centuries. The surviving rooms still reveal how people once lived within these walls.

Schloss Thürn is privately owned and not open to visitors; it can only be viewed from outside. It stands on the eastern slope of the Saualpe west of Siegelsdorf, in the Wolfsberg municipality of Carinthia. The two-storey Palas, the square tower with its onion-crowned tent roof and the round northeast tower are visible from the approach road.

The castle grounds once held Carinthia's largest continuous vineyard until the 19th century, which was replanted in the 1970s. The sloping terrain surrounding the property still bears traces of this winemaking past.