The people who anciently inhabited the present territory of Segariu first lived in caves and then began to build their dwellings in places that we now know very well, although almost nothing remains of them.
After the caves were gradually abandoned, the first huts began to be built at the site of Palabroniseand probably at other currently lesser-known locations(Coronas arrubia se Forruciriu). Although the area has been devastated by limestone quarries and little is left, it is guessed that the settlement must have been the most important in the present-day territory of Segariu, which excavations showed was inhabited for a very long time.
Later the nuraghe remained one of the most important centers in our area, as the largest settlement of late Punic and early Roman occupation arose around it. In the Punic and Roman periods, there were no large centers; the settlements were all located along the two banks of the Lanessi and Pau rivers and were, like most agricultural centers, large farms inhabited by the landowners, slaves, serfs and their families.
In our territory, along the two banks of the Lanessi River, old Segariu arose not as a single town, but as small hamlets several hundred meters apart, within which stood a church.
The largest center must have been the site of the churches of St. Peter, St. John and St. Anthony, fairly close to each other, on the right bank of the Lanessi, while going downstream on the left followed the site of Santa Itroxia, where the church of the same name probably stood, and still further downstream the site of the church of Santa Maria.
In the late Middle Ages, probably due to the gradual abandonment of the aforementioned centers, the present Segariu arose on the left bank of the Pau River, first around Sa mitza de s’arei, where the church of San Michele and later that of San Giorgio were built; later, as it grew larger, the right bank also began to be populated, where the church of Sant’Ambrogio was built and lastly, on a small hill, the church of San Sebastiano.
Our country remained for millennia inextricably linked and divided by the two rivers, Lanessi first and Pau later, becoming in historical times the country cut in two by the river.
Until 1454 and officially from 1519, Segariu’s history is linked first to the affairs of Trexenta, then, until 1839, to the barony of Furtei; thereafter, its history is the same as that of the whole of Sardinia.
Its territory, being located between Trexenta and Marmilla is formed in the north by flat land, where it reaches the lowest altitude of 100 meters in the locality of Castangianu, and in the south by hilly land, while it reaches the highest altitude of 371 meters in the area sa Moba de su casteddu. It covers an area of 16.7 km2, corresponding to 1670 hectares or 4175 starelli (ancient agrarian measure corresponding to 0.40 hectares).
