02 · Reading walls and moat

The cultural heritage department describes a square Vauban-style plan with projecting corners and surrounding moat: a 556 m perimeter, walls above 5 m and a moat deeper than 3 m. These are historical descriptions, not measurements surveyed for this app.

Official introductions disagree on the number of gates. This preview leaves that question open and does not derive a 3D reconstruction or walking route from the descriptions.