The Roman Fortress is located to the west of the Temple of Qasr Qaron (Qaroun). It measured about 90 by 80 meters and had square towers at each corner and semicircular towers on the sides. This mud-brick fort was built during the reign of the Roman emperor Diocletian (284-305 AD) with the purpose of protecting the city against the Blemmyes (a race of legendary creatures that were said to dwell in Africa, in Nubia, Kush, or Ethiopia). It also provided protection against potential attacks from caravans passing through the city of Qasr Qaruon (or ancient Dionysias). Though once erected of mud brick and measured about 90 by 80 m, the fortress is now in ruins. It had square towers at each corner and semi-circular towers on the sides. Within the fortress’ ruins, there are a few remains of a church.