San Lucian is one of the forts built during the reign of Grandmaster Wignacourt in the early 17th century.
According to local legends, a woman is said to have had a dream in which St. John advised her to tell the Grand Master to fortify the area around Marsaxlokk since an Ottoman attack was imminent. The woman told the parish priest, who told the bishop who in turn told Grandmaster. The Grandmaster did not give any importance to this, but that summer an attack really happened. Therefore, Grandmaster Alof Wignacourt ordered the construction of St Lucian Tower and other fortifications in the south of the island in the early 1600s.