28.2 and 29.2: The Fronte Mola di Thiesi, also known as Su Saccu, is an interesting “corridor” nuraghe, the only one so far known to have a rectangular plan (length m 16.20; width m 12.00; height m 8.00). It orients the longer side along the N-S axis and shows the entrance to the S. It is built at the base with large blocks of roughly hewn limestone and in the upper parts with smaller stones stacked and secured with wedges. (Sardegna Cultura).
Some define the complex of Monte Mesu, also in Thiesi and near the homonymous nuraghe, “like a prehistoric altar or, more simply, a nuragic place of worship,” while others identify it as a millstone or a Roman altar; some even see Roman tombs in it. The imagination runs wild in every sense. Scholars and enthusiasts draw their own conclusions… It consists of three basins, so much so that in Thiesi the monument is called “Sas Picas de Monte ‘e Mesu” (picas=basins). Two of them are square and not very deep; the third is truncated-conical and deeper than the other two. All the “trogoli” are connected to each other with small engravings, as if they were meant to serve as a release valve for, perhaps, some liquid (water, probably) flowing from one basin to another.” (Pieragica)
The photos of the nuraghe Fonte Mola are by Francesca Cossu and ArcheoUri Vagando. Those of the ceremonial altar of Monte ‘e Mesu and the homonymous nuraghe are by Giovanni Sotgiu and Bruno Sini.
