The tower n. 2

Description:
The structure is made by a mortar base, mixed by small stones (US 16), located in the south west corner of the excavated area.
The tower was built on the natural regolarized rock, and in the south side the rock substitute the outside face of the tower  so it is impossible to understand how the tower was wide.
Immediatly north of the tower there is a linked wall (US 17), 1 meter wide and 1,5 meters long that form with the basment of the tower a small ambient.

Interpretation:
We can suppose by the few clues that those remains can be a tower, like the other one discovered in the first campaign. (Tower 1) and dated to the first phase of the castle in the XII century.
The one side open room is possibly a guard-room for the soldiers.