Dating from about 5000 years ago (Late Neolithic), Montessu is the most extensive necropolis of “domus de janas” (prehistoric tombs) in southern Sardinia. It includes about 40 rock-cut graves set out symmetrically in a pleasant natural landscape, some in the form of a circular chamber with a low ceiling, others with a main chamber with lateral niches. The largest tombs were also used as sanctuaries.