The ruins of Leptis Magna, an ancient city that existed under the Carthaginian Empire and Roman Libya, are located a little over 80 miles east of Tripoli in the city of Khoms. One of the best-preserved Roman sites in the Mediterranean, it includes the remains of a Roman theater, amphitheater, marketplace, forum and an impressive triumphal arch known as the Arch of Septimius Severus, named after the Roman emperor and Leptis Magna native who commissioned it.