Two nuraghi on the Sant'Elia hill in Cagliari, a few meters from the village overlooking the sea.

This is the belief, supported by field tests and analysis of the architectural body, of archaeologists Raimondo Zucca (former professor of Archaeology and History of Greek and Roman Art at the University of Sassari), Giovanni Ugas (who taught Prehistory and Protohistory at the University of Cagliari) and Nicola Sanna . It is a chance discovery (or rediscovery) that occurred during a walk on a sultry summer afternoon.

A discovery capable of rewriting the history of Cagliari and giving further impetus to research on the most ancient settlements in the capital .

Carla Deplano , archaeologist, art historian, and professor at the Martini Institute, while walking along Via del Borgo Sant'Elia to reach the Perdusemini coastal tower, notices a stone structure resembling "the defying towers of the centuries" (as archaeologist Alberto Maria Centurione described it in the second half of the 19th century). The structure, embedded in the concrete wall that delimits a military area, has the characteristics of a nuraghe . Carla Deplano needs certainty. The help of specialists is needed to dispel any remaining doubts. Ugas and Sanna carry out an on-site inspection.

The oldest story - "We found ourselves faced," they explain today, "with a single-tower nuraghe , refaced, constructed with rows of limestone blocks, about seven meters high, built around the 14th-13th century BC, remodeled and reused in the last century as an observatory by the military, who built a ramp, exploiting the rows of stones as in the military post above the Diana nuraghe in Quartu." Raimondo Zucca is also involved, who convincingly supports the thesis. The investigations are continuing and are not limited to the area already inspected. On the road leading to the Savoy fort of Sant'Ignazio, scholars find another building with the characteristics of a nuraghe, less conspicuous, just over three hundred meters from the previous one .