Its ancient history runs parallel to that of nearby Siamanna, to which it was joined until 1975, when they became independent municipalities. Siapiccia was founded as a garrison town along a Roman road, the via (s’ia in Campidonese) that led from Usellus to Forum Traiani (Fordongianus), along the western slope of Mount Arci. The second half of its name (piccia, small) derives from this road being a smaller, secondary road with respect to the manna (big) road, along which Siamanna is located. The village, with less than 400 inhabitants, stands at the border of the Campidano plain of Oristano Province, from which it is 18 kilometres away, by the western slope of Monte Grighine and at the gates of the Barigadu historical territory. It’s an area rich in outcrops of quartzite, which was once used to obtain tinctorial materials, and in thermal springs: the most well-known are the therapeutic Sa Mitza de S’acqua Callenti thermal spring, and the microbiologically pure S’Arrogana Spring. The mountain, with its weathered rocks and at times impenetrable Mediterranean shrubs, dominates the landscape.