As a result, it is a very rough place. The castle itself is designed to be defensible but acts primarily as a base camp. The Duke would not fall back here to prepare for a siege; rather, he would harry invading armies whilst slowly falling back to the Brienne. There is only a single curtain wall, which encloses a large mustering area, and the keep is very small. The Duke lives in a complex of buildings that are less defensible but much more comfortable.[1a]