Domus de janas di Sa Rocca 'e su Lampu

The tomb belongs to the type known as a prospetto architettonico (architectural façade) tomb. This type is found almost exclusively in the Sassarese, where 90 examples are counted, and is characterised by a façade that imitates the arched stele typical of the tombs of the giants.

The tomb is cut into a limestone wall that drops almost sheer to the valley below. The façade is 2.60 m high and shows a simple stele without the usual mouldings, smoothed by weathering or perhaps deliberately by people. In the upper part are three holes 15-16 cm in diameter and 9-14 cm deep, presumably intended to hold small betyls of stone or wood.

At the foot of the monument is a semicircular exedra 7.40 metres long, along which runs a bench 0.40 × 0.25 m high. The entrance opening at its centre is now 1.35 m wide and 1.30 m high but was originally narrower, and it gives access to the funerary chamber. Like most façade tombs made new in the rock, it has a single chamber, with a semi-elliptical plan (2.35 × 3.00 m), a circular profile and a maximum height of 0.83 m. On the left inside is a large niche whose function is unclear but which was presumably used to deposit votive objects.

The monument was studied by the archaeologist Paolo Melis, who published an account of it in the proceedings of the 1994 international congress on hypogeism in the Mediterranean, held at Sassari and Oristano.