Santadi is an important agricultural castle in the center of a fertile vineyard built by Rio Mannu, which divides the habitat into two nuclei, Santadi Basso originated in the second degree, and Santadi “‘e Suso” also exists in the Middle Ages called Sant’Agata or Santa Ada de Sulcis, who developed its plan, articulated in a semicircle and equipped with buildings, around the parish church of S. Nicolò.
The church, rebuilt in the nineteenth century at the top of the town, in a steep garden square, has the chapel of S. Maria delle Grazie dating back to the fifteenth century.
The precautionary request to reveal this territory is attested by the Phoenician fortress of Pani Loriga founded in the seventh century. B.C. by the Phoenicians, at the top of a tabular hill (1 km approx. SW of the town) previously affected by a prehistoric necropolis in the «domus de janas».
At the locality of Benatzu (about 5 km S of Santadi) two caves can be visited with a local guide, one called Is Zuddas, at the foot of Mount Meana, of considerable speleological interest for its splendid concretions, and one called Pirosu , used as a sanctuary in the first and first part of the Iron, important for the archaeological material found: goldsmiths, bronosi numeros (including a tripod of Cypriot derivation and a “double holiday” fi bula imported from the Phoenicians) and many ceramics.
