History and Excavation of Su Nuraxi

A detailed view at the archaeological history of the Barumini complex. This details its prehistoric construction, historical phases, and modern excavations.

The archaeological site of Su Nuraxi di Barumini is the most complete remaining witness to the prehistoric Nuragic culture. Located in south-central Sardinia, this complex was built over successive centuries. The site evolved from a simple stone watchtower into a massive military fortress and residential village. Today, it is a UNESCO World Heritage Site, recognized globally since 1997 for its architectural and historical significance.

The Bronze Age Foundation (1500 BC – 1100 BC)

The origin of the site dates back to the Middle Bronze Age, around 1500 BC. The first builders erected a central stone keep (mastio) using massive blocks of local basalt. This tower rose to a height of three stories. It includes three corbelled stone vaults (tholos) built one on top of the other. The construction utilized gravity and stone placement without mortar.

During the Recent Bronze Age, around 1100 BC, the central keep was fortified. Workers constructed a quadrilobate bastion consisting of four defensive corner towers, oriented to the cardinal points of the compass. These towers were connected by a thick curtain wall. An outer wall with additional defensive towers was built around the complex. This formed a protected courtyard to shield the community during conflicts.

Iron Age Expansion & Village Growth (800 BC – 500 BC)

By the Iron Age, around 800 BC, the military function of the central fortress became secondary to the domestic needs of the growing community. A residential village of circular stone huts developed around the bastion. Huts were built of smaller basalt blocks with conical wooden roofs supported by branches and straw.

The village featured specialized structures. Among these is a meeting room (curia or assembly hall) with a stone bench along the circular wall where elders gathered to discuss administrative issues. Excavations also revealed sweat baths, bread-making ovens, and workshops for bronze casting and pottery production.

Carthaginian and Roman Occupation

In the late 6th century BC, Carthaginian forces invaded the region. This damaged parts of the defensive walls. Despite this destruction, the village remained inhabited. When Rome conquered Sardinia in 238 BC, the local population adapted. Roman settlers occupied the circular huts. This converted them into domestic dwellings, olive oil storage rooms, and agricultural cellars. The site remained inhabited in various forms until the early medieval period.

Giovanni Lilliu and the Modern Excavation (1950 – 1957)

For centuries, the ruins of Su Nuraxi lay buried beneath a giant soil mound. Local residents referred to the hill as "Sa Nuraxi" (the nuraghe), but its full scale was unknown. In 1950, the pioneering Sardinian archaeologist Giovanni Lilliu initiated systematic excavations at the site. Lilliu, born in Barumini in 1914, led a team of local workers to clear the soil and stones from the central keep and surrounding huts.

Over seven years of excavation, Lilliu uncovered the complex. He established the historical timeline of Nuragic culture. This divided the site's evolution into distinct phases based on architectural styles and clay artifacts. His work revolutionized Mediterranean prehistory. This research demonstrated the technical sophistication of the Bronze Age Sardinians. The site was added to the UNESCO World Heritage list in 1997. This confirmed its international importance.

Post-Excavation Research and UNESCO Recognition

Following the excavation, Su Nuraxi became the focus of scientific research. Scholars analyzed the construction methods, pottery sequences, and bronze figures. The data demonstrated that the Nuragic civilization had a complex social structure and traded with other Mediterranean cultures such as Mycenaean Greece and Phoenician colonies. The 1997 UNESCO designation recognized the site as a unique cultural achievement. This established its role as an educational monument.

The research continues today, with archaeologists using modern technologies to study the site. Non-invasive scans, soil analysis, and digital mapping deliver new details about the construction phases and daily routines of the villagers. The Centro Giovanni Lilliu manages the archive of excavation records. This preserves the data gathered by Lilliu and his team. This work guarantees that the history of Barumini remains accessible to researchers and tourists alike.

Stratigraphy and Archaeological Chronology

The systematic excavations led by Giovanni Lilliu revealed a clear sequence of archaeological layers (stratigraphy). The lowest layers correspond to the Middle Bronze Age, where researchers uncovered fragments of simple impasto pottery. During the construction of the central mastio, builders placed olive wood logs in the foundation trenches to stabilize the stone blocks. In the 1990s, radiocarbon (C-14) dating of these preserved olive wood fragments confirmed a construction date around 1500 BC. This scientific analysis established the absolute chronology of the Nuragic building phases.

In the upper layers, the team uncovered significant Roman artifacts. After conquering Sardinia in 238 BC, the Romans reused the circular stone huts as storage cellars and simple dwellings. Archaeologists found fragments of Roman terra sigillata (fine red tableware) and bronze coins dating to the reign of Emperor Augustus. This transition shows that the site evolved from a high-status military stronghold into a modest agricultural village under Roman rule.

The site also yielded evidence of early medieval reuse. During the Byzantine era, local farmers utilized the ruins for temporary shelter and livestock pens. The archaeological team found simple iron tools and early Christian oil lamps. This confirms that the site remained a point of human activity long after the fall of the Western Roman Empire. This deep stratigraphical sequence details the long historical memory of Su Nuraxi.