Dualchi, Protonuraghe Cubas

The monument stands on the edge of the plateau that dominates the valley through which the Murtazzolu river flows.
The nuraghe, located near three tombs of giants and a nuragic fountain, is a building with circular corridors (diam. m 12.65/13.05), equipped with two entrances.
The tower (height 5.50/3.53 m) is built with stones, sketched and of various sizes, arranged in irregular rows.
The main entrance a, quadrangular (width 1.00 m; height 1.23 m) and closed by an lintel without a drain compartment, leads into a short trumped corridor (length m 1.75; width m 1.00/1.50) on which a large semi-elliptical niche opens up (length m 2.58; width m 1.20/1.30; height m 1, SO/1.8S) with projecting walls and a flat band roof.
On the left wall of the corridor there is the entrance to the second corridor, which develops curvilinally parallel to the outer wall (length 8.50 m; width 1.00 m; height 2.35 m).
On the right wall of the main corridor, the entrances to two secondary corridors open: the first is now interrupted by the collapse (length m 2.00; width m 0.90; height m 2.10), while the second (length m 4.50; width m 0.65/1.35) widens and leads, to the right, into a sort of elliptical compartment (length m 2.60; width m 0.50/0.95), and then continues - turning left towards the second entrance - in a stretch of corridor (length m 2.00; width m 0.60/0.90) interrupted by rubble.
The secondary entrance, built on the south-west side, has a quadrangular light (width 1.10 m; height 1.20 m above sea level) closed by a powerful lintel, and leads to a corridor behind that ends after 1.35 m.
Around the building, the remains of the extensive settlement are visible.

History of studies
The monument has been mentioned since the nineteenth century.

Bibliography
V. Angius, in G. Casalis, Historical-Statistical-Commercial Geographical Dictionary of the States by H.M. the King of Sardinia, VI, Turin, G. Maspero, 1840, p. 316;
A. Della Marmora, Voyage en Sardaigne ou description statistique, phisique et politique de cette ile avec des recherches sur ses productions naturelles et ses antiquités, Paris, A. Bertrand, 1840, p. 103; Ministry of Education. List of monumental buildings, Rome, Tip. operaia Romana Cooperativa, 1922, p. 107;
A. Taramelli, “Sheet 205, Capo Mannu; Sheet 206, Macomer”, in Archaeological Edition of the Map of Italy at 100,000, 8, Military Geographic Institute, Florence, 1935, p. 24;
A. Moravetti, “On the protonurages of the Marghine-Planargia”, in R.H. Tykot-T.K. Andrews, Sardinia in the Mediterranean: a footprint in the sea. Studies in Sardinian archaeology, Sheffield, Sheffield Academic Press, 1992, p. 186, fig. 2, II. 40;
A. Moravetti, Archaeological research in the Marghine-Planargia. The Marghine - Monuments, Part One. Sassari, C. Delfino, 1998 (Archaeological Sardinia. Studies and monuments; 5), pp. 627-629;
A. Moravetti, Archaeological research in the Marghine-Planargia. The Planargia — Analysis and Monuments, Part Two. Sassari, C. Delfino, 2000 (Archaeological Sardinia. Studies and monuments; 5).

How to get there
Leave the SS 131 at the junction for Borore (135 km) then turn on SP 33 and continue for about 9 km until the junction of the road to Silanus. Proceed in the latter and, after 300 m, take a small paved road to the left. After 2.8 km you cross the Nuraghe Ponte, located on the left, after a curve you arrive at a gate (on the left). Leave the car and walk through the fields to the monument.