They belong to the defensive system of the coast and hillside villages developed by the people of Liguria to protect their homes from the incursions of the Barbary pirates. In Strada Punta San Pietro, on the hills behind Ospedaletti there is a square tower used for sighting and signaling, built in 1558, in a dominant points. The defensive tower, still visible today in Via Roma (at the crossing between Via di Pettinengo with Via Pio VII), was completed in 1597 and is as described in the documents of those days: “a square building, two and thirty spans in altitude; on the level of the cordon a vaulted, strong enough to sustain the artillery and two look-out towers”.