The House of Khevenhüller is the name of an old Carinthian noble family, documented there since 1356, with its ancestral seat at Landskron Castle. In the 16th century, the family split into the two branches of Khevenhüller-Frankenburg, Imperial Counts (i.e. immediate counts of the Holy Roman Empire) from 1593, and Khevenhüller-Hochosterwitz, raised to Imperial Counts in 1725 and, as Khevenhüller-Metsch, to princely rank (Fürsten) in 1763. The family belongs to high nobility.