MegaMuseo – Sito megalitico di Saint-Martin-de-Corléans

Beneath an ordinary Aosta district, deep below street level, lies a sacred landscape in use for six thousand years: ritual furrows cut into the earth, aligned wooden posts, carved statue-menhirs and megalithic tombs. The MegaMuseo preserves the whole sequence in situ, making it one of Europe's most important protected prehistoric sites and Aosta's most surprising museum.

Why it matters

Most Neolithic and Copper Age sanctuaries survive as scatters of stones. This one survives as a place. Excavations begun in 1969, when foundation works for new buildings struck a decorated stele deep below street level, uncovered an uninterrupted ritual sequence: ceremonial ploughing furrows from the fifth millennium BC, large ritual pits, alignments of wooden posts and, from the third millennium, anthropomorphic statue-steles standing where they were raised. The site then became a necropolis of monumental tombs before Roman and medieval layers sealed it. The regional heritage service describes the roughly 10,000-square-metre complex as the largest covered megalithic area in Europe, and its state-led presentation — site and museum designed as a single continuum — has few parallels anywhere.

What to notice

The site presents a sequence of ritual and funerary phases. The earliest layer is the network of scoring marks ploughed into the living rock, read by archaeologists as an open-air sanctuary of a farming community. The postholes mark a vertical structure of wooden poles, a form typical of sacred enclosures, later complemented by stone figures. The statue-menhirs are a notable feature: carved faces and signs that prefigure writing. In the necropolis zone, Tomb 2 is a dolmen that held the remains of dozens of individuals — mostly male adults, but also women and children, some newborn — a community's honoured dead gathered over generations. The museum's ramps and walkways keep the excavation in view rather than hiding it behind glass.

Context and history

Archaeologist Franco Mezzena identified the first evidence in 1969 and directed the excavations for two decades; the region acquired the land to protect the site. After long study and redevelopment, the presentation reopened under the MegaMuseo name in 2023. The site's archaeological remains and museum presentation form a connected whole. In 2019 the area became the first Italian member of the European Route of Megalithic Culture. The sequence continues upward into the Roman period — a rural building and a roadside necropolis outside the walls of Augusta Praetoria — and to the medieval church of Saint-Martin-de-Corléans, which made the ground a religious centre again.