Bellonids , which would rule many honores  in Septimania and  Catalonia  for three centuries. In 1067 Carcassonne became the property of  Raimond Bernard Trencavel ,  viscount  of Albi  and  Nîmes , through his marriage with Ermengard, sister of the last count of Carcassonne. In the following centuries the  Trencavel  family allied