With its 7.80 metres of diameter, the dolmen circle n. 4 is the largest tomb in the necropolis of Li Muri (fig. 1).

Fig. 1 - Plan (from ANTONA, LO SCHIAVO, PERRA 2011, p. 242, fig. 1).

The dolmen circle consists of a rectangular stone cista tomb, NS oriented, whose walls each consisted in a slab of granite planted like a tooth and surmounted by a flat slab as a covering (fig. 2).

Fig. 2 - Arzachena, Necropolis of Li Muri, lithic cista of circle 4 (photo by Unicity S.p.A.).

In ancient times, it was inserted at the centre of a ring of granite slabs fixed vertically in the ground, and sealed by a mound of earth and gravel (fig. 3).

Inside it could contain one or at most two burials.

From the excavation ledger dated 1939, it has been possible to learn interesting details concerning the funerary ritual, it is in fact known that two layers of deposit have been identified internally, separated one from the other by granite slabs arranged horizontally. Only the stones of the double external walls remain of the entire circle; the cista contained in it is compromised.

The small sized rubble it contains is all that remains today of the original mound (fig. 3).

Fig. 3 - Rendering of the funerary circles (photo by Unicity S.p.A.).

The tomb circle n. 4 contained five apple-shaped spheroids (figs. 4, 5, 6, 7) interpreted as artefacts indicating power symbols dating to the third millennium B.C., found together with lithic hatchets and stone elements of a necklace.

Figs. 4, 5, 6, 7 - Arzachena, Necropolis of Li Muri, apple-shaped spheroids (from ANTONA 2013 pp. 82-83).