Roman ruins of Tharros With the Gulf of Oristano as a backdrop and a Spanish tower overlooking it, the ancient Roman ruins of Tharros are popular amongst visitors to Sardinia. The settlement dates back to around 800 B.C. when the Phoenicians first settled on the peninsula. Among the ruins are ancient baths, aqueducts, temples, houses and the two upright columns just off the sea. A small entrance fee is due to visit the site and it is well worth a look.