It is a circular brick tower 15 metres in diameter and 17 metres high, built by the Royal Corps of Sardinian Engineers between 1818 and 1823, situated on the heights of Quezzi. (318 m a.s.l.). The tower dominates the heights of the Bisagno valley, and was built to make up for the lack of an adequate defence of Fort Quezzi along the north ridge of the mountain, which would have provided an easy starting point for enemy troops to attack the fort. The Sardinian Engineers did their utmost to reinforce that side of the mountain with the construction of a small circular “support” structure. The tower is a truncated cone-shaped construction, with pilasters inserted halfway up to support the parapet crowning the roof, which today, like most of the construction, is in ruins. On the inside of the pilasters are machicolations, originally protected by large opening grates.
The entrance was originally protected by a semi-circle moat, and by a drawbridge of which no traces remain today, but which still has a masonry counterscarp in front of the entrance used as a support for the bridge when it was lowered. The interior had three floors, today mostly totally collapsed, supported by four supporting pillars, in one of which are the service stairs that went up to the floors. On the first floor, on the east side, there is a large embrasure for the gunboat, flared downwards because the artillery piece was for the defence of the Tower and not for offensive purposes.
On the upper floor one can see another embrasure for the gunboat, which had a straighter “shot”. The upper terrace, now unreachable, was accessible through a small casemate and was built “bomb-proof”, i.e. from a thick layer of earth that would have served to absorb the impact of a bombard of the time. In the centre of the ceiling there was originally a small marble roof, which could be opened to facilitate the disposal of gun smoke, via a vertical circular chimney connected to the interior. The armament was represented by two cannons of 8, two long howitzers and the two small cannons mentioned above, while the personnel could vary from 20 to 50 in case of need. After almost 100 years, around 1909, the building was abandoned by the military authorities and used as a restaurant, then finally abandoned immediately after the Second World War, when the metal parts and floor rods were removed, causing it to collapse.
(Taken from “I forti di Genova” Sagep Editice)