 There are signs of early semi-permanent settlements in the area, evidenced by archaeological finds throughout the Aude.The Aude river formed the basis of a major trade route (Aude-Garonne corridor) and a combination of the warm climate and water availability from the Montagne Noire allowed for settlement if not farming.A number of "oppida", large permanent settlements often associated with defensive positions such as hilltops or river bends, are located in the area.