On the east of the south face is an angled stair turret.
There is a stair turret set at an angle on the north side of the tower.
On the southeast corner of the tower is a stair turret.
Tower and rare stair turret were added in 10th century.
On the south side of the tower is a stair turret.
On the west wall of the tower is a stair turret.
It has a west window, and a stair turret to the north.
At the southwest corner of the tower is a stair turret.
On the north face of the tower is a stair turret.
On the east side is a stair turret with a small watch-chamber above.
