The work "Genealogischen Tafeln zur mitteleuropäischen Geschichte" (1965–1967) by Wilhelm Wegener introduced a theory that Berthold I was married to a member of the Hohenwart family, a line of the wider Ratpotonen dynasty.
In medieval times it belonged to the estates of the Hohenwart castle, seat of the Counts of Celje, the Counts of Ortenburg, the Knightly Order of Saint George in Millstatt and finally the Austrian House of Habsburg.