The fertile hills of Trexenta have been an attraction since prehistoric times. This is testified by circa 50 Nuragic settlements in the territory of Mandas alone, an agropastoral village of medieval origin that has always served as a crossroads for various peoples, as a land of passage between Campidano and Barbagie, as can be seen by a short stretch of Roman road in the centre of the town. Among the many remnants, the Nuraghe su Angiu, also known as Bangiu, forming the greatest legacy left by the Nuragic civilisation, bearing traces of prehistoric and historical overlaps in two areas, one Nuragic and inhabited in historical times, the other Punic, then Roman and High Medieval.

The archaeological complex extends across approximately three hectares, dominated by an imposing quadrilobed Nuraghe covered with a tholos (false dome) with bulwark. The first “anthropisation” of the edifice was undertaken by the Nuragic peoples between the final Bronze Age and the Iron Age (12th-8th century BC), presenting a particular cultural multi-layering from the 9th century BC.