As elsewhere in the Western Empire, the Roman occupation largely overwhelmed native styles; Iberia was an important agricultural area for the Romans, and the elite acquired vast estates producing wheat, olives and wine, with some later emperors coming from the Iberian provinces; many huge villas have been excavated. The Aqueduct of Segovia, Roman Walls of Lugo, Alcántara Bridge (104–106 AD), and the Tower of Hercules lighthouse are among a number of well-preserved major monuments, impressive remains of Roman engineering if not always art. Roman temples survive fairly complete at Vic, Évora (now in Portugal), and Alcántara, as well as elements in Barcelona and Córdoba. There must have been local workshops producing the high-quality mosaics found, though most of the better free-standing sculpture was probably imported. The Missorium of Theodosius I is an important Late Antique silver dish that was found in Spain but was probably made in Constantinople.