 It is believed, however, that the old fortress on the town's hill dates to before the Islamic-Arab possession of the island.In the Arabian era from the 10th to the 13th century and even during the early days of Catalan rule, the fortress was known as the "Almudaina", which means something like "castle" or "fortress".Today the one-meter thick fortress wall with its nine towers, including the main tower of "Sant Miquel", surrounds the pilgrimage church of "Santuari de Sant Salvador" with its outbuildings.