Dating to the early 14th century, the castle ruins are located on a rock cone of the Ossiach Tauern range, at an elevation of 658 metres (2,159 ft) above sea level.

[1] Today Landskron Castle, its falconry centre conducting regular flying demonstrations, and the nearby macaque enclosure are major tourist destinations.

Settled since the Hallstatt era, the estates around Lake Ossiach were first mentioned in an 878 deed issued by the East Frankish king Carloman of Bavaria, who granted them to the monastery of Altötting he had established shortly before.

Later, the Habsburg rulers temporarily gave it in pawn to Count Hermann II of Celje, heir of the Ortenburg dynasty in 1418, and the Lords of Stubenberg.

In 1552 Khevenhüller even received the visit of Emperor Charles V, who, on the run from the Protestant troops of Elector Maurice of Saxony, had fled to Carinthia.