Inside Marsamxett harbour, the inlet which once sheltered the Turkish Armada during the Great Siege of 1565, lies a small leaf-shaped island previously known as the "Izoletto" or "Bishop's Island". Its strategic value was noted during the 16th century due to the potential threat that it posed to the western flank of the new city of Valletta. However, it was not until 1723 that work on a fort was finally initiated. Denying any attacking force access to the island became crucial, with the development of artillery's strength and range.
