Viollet-le-Duc 
City of Carcassonne [PDF ebook] 

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The Visigoths, among all the Barbarian peoples who invaded the East were those who assimilated most rapidly the remains of the Roman arts, at least with regard to military constructions and, indeed, those of Carcassonne are quite similar to those used about the end of Empire in Italy and in Gaul. They understood the value of the situation of Carcassonne and made it the center of their possessions in the narbonnaise.