It is a common fact that Charles V, when he added a dry ditch to the fortification has taken the wall (adding parapets, loopholes, general consolidation), which were in a poor condition.We may thnik that this by itself has changed the bonding of the stones kown around in a significant way.
This picture was taken by Gerri Kotkamp in june 2002, showing the workers working for the Maison du Caucase, revealing the wall