The tower is square in plan (4.4 × 4.4 m) and four stories high, built of rubble stone. The entrance is on the south at second-story level, 2.6 m above the ground. The door has an architrave bearing a schematic carving of a hand on the outside; bolt sockets are set in the door jambs. A staircase of stone blocks stands before the door. The first story is a hiding place, with one loophole on the south