In 1442, it housed two bombards that fired stone cannon-balls. According to the Record Office of Genoa, cannon batteries were constructed on the site in the early 16th century, and military engineer  drew up plans for a full fortress circa 1554.
In 1442, this location had two cannons that fired stone projectiles. The Record Office of Genoa indicates that cannon batteries were built at the site in the early 16th century, and military engineers created blueprints for a complete fortress around 1554.