Rudeneck Castle was built in the second quarter of the fourteenth century as a rather large new two-part main residence for the Lords of Altenburg (Slo. Vrbovec), which sparked a feudal war. After the conflict, the significance of the castle and the Lords of Altenburg waned. By the sixteenth century at the latest, the original castle core had been abandoned. A detached Gothic great tower was preserved, next to which a new Renaissance-style building was constructed soon after 1578 to serve as the personal country residence of Ljubljana’s bishop Janez Tavčar. Once it lost its residential and economic significance, the castle became increasingly neglected from the first third of the seventeenth century onwards and was ultimately abandoned soon after 1681. Although its remnants are rather modest, they nonetheless allow for an interpretation of building development. The article also provides concise architectural-historical analyses of the Haslach (Slo. Lešje) manor or mansion and the former Rudenstein Castle (Slo. Rudenštajn), both of which were historically and spatially linked to Rudeneck Castle.