 After the extinction of the Counts of Celje in 1456, it was inherited by the Habsburgs, who sold it in the mid 16th century to Baron Hans Khiessl.Khiessl successfully petitioned Emperor Ferdinand I for the right to rename the castle after himself, and also expanded the tower into an L-shaped castle, giving it its present appearance.The Khiessls soon sold the castle to Franz von Moscon; later owners included the Ravbar, Apfaltrer, Auersperg and finally Natalis Pagliaruzzi noble families.