Kal'at Al Mina is Fatimid citadel in Ashdod-Sea site on the southern coast of modern city of Ashdod. It was built during the Ancient Arab Era (640-1099). The rectangular fortress (60/40 meters) has four guard towers, one at each corner. The towers were enclosed by a wall six to seven meters high. Two huge gates in the wall gave access to the stronghold. The fortress was destroyed in earthquake in 1033.