A great city of antiquity founded, according to tradition, on the north coast of Africa by the Phoenicians of Tyre in 814 BC and now a suburb of Tunis. However, Phoenician occupation on the site is archaeologically attested from about a century later. The Aeneid tells of the city's founding by the Tyrian princess Dido, who fled from her brother Pygmalion (a king of Tyre). Until around 500 BC Carthage was one of three great mercantile powers in the central Mediterranean, together with the Etruscans and Western Greeks. Much of Carthage's revenue came from its exploitation of the silver mines of North Africa and southern Spain, begun as early as 800 BC, and from its role as a middleman in trade. Carthage was for many years in conflict with the Greeks, especially in Sicily. Carthage lost both Sicily and Sardinia to Rome in 241 BC at the close of the First Punic War. From an enlarged domain in southern Spain, the Carthaginian general Hannibal in 218 BC led his army across the Alps to victories in Italy. When Hannibal returned to Africa, he was defeated at Zama in 202 BC. Though humiliated, Carthage survived until it was destroyed by Rome in 146 BC, after having fought the three Punic Wars of the 3rd and 2nd centuries. Carthage was then reconstructed as a Roman city by Julius Caesar and Octavian. The Roman city prospered by shipping grain and olive oil to Italy. Carthage replaced Utica as the capital of the African province and it became the second largest city in the western part of the empire, after Rome itself. The Phoenician/Punic remains include the citadel, Byrsa, the Sanctuary of Tanit, and two manmade harbors (all pre-146 BC); the Roman remains are the Antonine Baths, odeum, theater, circus, amphitheater, aqueduct, and areas of streets and houses. Also on the Byrsa site stood an open-air portico, from which the finest Roman sculptures at Carthage have survived. The standard of living in Carthage was probably far below that of the larger cities of the classical world. In Roman times, beds, cushions, and mattresses were luxuries. The Punic language and its distinctive alphabet remained in use long after the city's destruction. After the breakup of the Roman empire, the Vandals took Carthage in 439 and stayed in control until the Byzantine invasion in 533. Carthage was the capital of the Byzantine empire in Africa until the Arab takeover of 698.