In 1738, Carlo Emanuele III King of Sardinia gave his formal consent for a numerous group of inhabitants of Tabarka, with Ligurian origins, to move to the Island of S.Pietro.

Later, part of this group moved to the Island of S.Antioco, which was almost uninhabited, where they founded the town of Calasetta. More than two centuries after its foundation, and despite of the ever-increasing exchanges and contact with Sardinian people, the inhabitants of Calasetta have preserved their Ligurian dialect and traditions.

The town's economy is essentially based on tourism, fishing and agriculture (the particularly sandy terrain favours the cultivation of vines and the area is, above all, noted for the fine wine made from the Carignano grape, grown throughout the Sulcis district).

The Island of S. Pietro can be reached by ferry from the small harbour. In the historic centre visitors can admire the parish church of S.Maurizio and the Town Hall, whilst a stroll up to the highest point in the town takes you to the Spanish Tower, dating back to the XVII century.
The road that winds up to the tower continues towards a large beach called "Sotto La Torre" (Below the Tower). Further on there is the Spiaggia delle Saline, and finally the splendid beach of "Nido dei Passeri".