The most conspicuous and important of these are the nuraghi (the word is said to be a corruption of muraglie, i.e.
The majority perhaps of the nuraghi of Sardinia present this simple type; but a very large number, and, among them, those best preserved, have considerable additions.
Sometimes they occupy the approaches to tablelands, the narrowest points of gorges, or the fords of rivers; sometimes almost inaccessible mountain tops or important points on ridges; and it may be noticed that, where two important nuraghi are not visible from one another, a small one is interpolated, showing that there was a system of signalling from one to another.
A final argument is the existence in some cases of a village of circular stone buildings of similar construction to the nuraghi, but only 15 to 25 ft.
We thus have two classes of tombs in connexion with the nuraghi, and if these were to be held to be tombs also, habitations would be entirely wanting.'
Nissardi, " Contributo alla storia dei Nuraghi " in Atti del Congresso delle Scienze Storiche (Rome, 1903), vol.
(Leipzig, 1909); and " Dolmens, Tombs of the Giants and Nuraghi of Sardinia," in Papers of the British School at Rome, v.
To the south-east, in the district known as the Cunelie, are a large number of tombs, known as sesi, similar in character to the nuraghi of Sardinia, though of smaller size, consisting of round or elliptical towers with sepulchral chambers in them, built of rough blocks of lava.