 Over the next century, most of the Catalan counties would come into the hands of the counts of Barcelona.In time, one of the Counts of Barcelona, Ramon Berenguer IV, would marry the heiress of Aragon, Petronella, uniting the counties under the count's power to that kingdom, creating the Crown of Aragon.Several of the later kings re-created some Catalan counties as appanages for younger sons.