The nuragic complex of S’Urachi and the settlement of Su Padrigheddu (San Vero Milis - OR). Interdisciplinary researches to approach the relationships between the latest nuragic people and the earliest Phoenicians - The archaeological excavation and the geoarcheological researches carried on in 2005 at Nuraghe S’Urachi and in the surrounding area brought new data on the structure of the monument. The stratigraphic soundings at the base of the towered antemural and of the added wall in ashlar masonry, as well as the analyses of soil samples, clarified the formation of the deposits adjacent to the monument and the relationships between these and the punic settlement. The alluvial layer above which the monument is founded has been brought to light. S’Urachi was built by transporting thousands of large blocks from the basalt deposits more than two kilometres away; this reveals the wilfulness of a seemingly inconsistent choice and the role of the monument in the territorial management. Moreover has been taken up again the study of the finds recovered some decades ago in the adjacent site of Su Padrigheddu, which proved to be a mixed settlement of the 8th cent. BC occupied by inhabitants of nuragic origin and by Phoenicians.