The castle displays a rectangular shape of 60 x 40 meters (180 x 120 feet)
The east side, facing the Isère valley is
guarded by 2 towers in both angles. The
keep includes a large round tower, a small chapel
and the buildings where the lord and his people were living.
The other sides and the doors are defended by hoardings (wooden
Several other buildings are scattered against the walls of the
castle in the bailey.