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.