 The Hafsids decided to destroy its defenses so it couldn't be used as a base by a hostile power again.Roman Carthage was used as a source to provide building materials for Kairouan and Tunis in the 8th century.By 120 - 130 BC, Gaius Gracchus founded a short-lived colony, called "Colonia Iunonia", after the Latin name for the Punic goddess Tanit, "Iuno Caelestis".