Not only is it the largest Nuragic megaron temple known to date, but it is the site where a real archaeological ‘treasure’ was discovered, also the protagonist of a popular legend. Sa Domu de Orgia stands at an altitude of about a thousand metres on Monte Cuccureddì, in the territory of Esterzili, a village nestled between the plateaus and valleys of Barbagia di Seulo. The sanctuary, enclosed by an elliptical-shaped fence, is 22 and a half metres long and just under eight metres wide. It consists of a vestibule, obtained by extending the side walls, a cell divided into two spaces and a small opisthodomos on the opposite side to the entrance, probably with the function of making the structure more symmetrical. The construction material is schist, worked in square blocks positioned in horizontal rows.