In the second half of the nineteenth century, Giovanni Spano reported remains of walls from the Roman era in front of the trachyte ridge on which the domus de janas of S. Andrea Priu opened up.

In 2005, after an archaeological survey carried out by the Archaeological Heritage department for the provinces of Sassari and Nuoro, the areas of a thermal baths structure were brought to light (figs. 1, 2, 3, 4).

Heat spread through the rooms thanks to the hypocaust system, via the cavities made with tegulae hamatae, arranged between the support wall and the wall covering. A semi-circular room, probably the praefurnium and other rooms that were the tepidarium, calidarium and two frigidaria were found. The thermal bath building can be dated to the Imperial Roman Age (1st - 5th century A.D.).

Fig. 1 - The remains of the Roman thermal baths opposite the S. Andrea Priu necropolis. (Photo by M.G. Arru).

Fig. 2 - The remains of the Roman thermal baths opposite the S. Andrea Priu necropolis. (Photo by M.G. Arru).

Fig. 3 - The remains of the Roman thermal baths (photo M.G. Arru).

Fig. 4 - Fragments of flat and brick tiles next to the Roman thermal baths ruins (photo M.G. Arru).