In a 891 deed mentioned as Liburnia, it became the centre of the Upper Carinthian counts in the mediæval Lurngau, who resided at Hohenburg Castle.
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He marched against Carinthia from his Tyrolean residence at Bruck Castle, crossing the border at Oberdrauburg and occupying Spittal to lay siege to the Ortenburg fortress.
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He was finally defeated in 1460 and had to sign the Treaty of Pusarnitz at episcopal Feldsberg Castle, whereby he renounced all Carinthian estates in favour of the Austrian House of Habsburg.