Predjama Castle is first attested in 1274, the year it was built, in the Gothic style, by the Patriarch of Aquileia. It was later rebuilt by its new owners, the Luegg family, whose most notorious member was Erasmus of Predjama. Predjama Castle is the only completely preserved cave castle in Europe. Its unique situation halfway up a cliff offers a unique insight into the construction techniques and inventiveness of its medieval builders, who sought a safe refuge right by the entrance to the cave.
The castle has featured in numerous documentaries and feature films. Two of the most prominent are an episode of the reality series Ghost Hunters International and the film Armour of God starring action hero Jackie Chan.
Inside the castle, visitors can see numerous replica weapons – lances, halberds, swords, battle hammers, longbows, crossbows and armour – in a faithfully reconstructed room in the main castle attic.