"A Mediterranean unicum—prehistoric symbols that defy interpretation"
Altare Rupestre di Santo Stefano
Oscheri/Oschiri, Sardinia, Italy
In the Sardinian countryside between Sassari and Olbia, a ten-meter granite slab bears geometric carvings found nowhere else in the Mediterranean. The Altare Rupestre di Santo Stefano stands within a landscape of rock-cut tombs, opposite a medieval church that tried to Christianize what it could not erase. The symbols remain undeciphered, their purpose unknown.
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Quick Facts
Location
Oscheri/Oschiri, Sardinia, Italy
Tradition
Site Type
Coordinates
40.6850, 9.0097
Last Updated
Jan 31, 2026
Learn More
Created by an unknown culture, possibly the Ozieri (3500-2700 BCE). Unique in the Mediterranean—no parallels exist. Later Christianized with Byzantine crosses. Medieval church built opposite in 1492. Dating remains uncertain without excavation.
Origin Story
The origins of the Altare Rupestre di Santo Stefano cannot be established with certainty. The altar lies within a sacred landscape shaped by the Ozieri culture, whose rock-cut tombs date to 3500-2700 BCE. Whether the altar itself belongs to this period is unknown—no archaeological excavations have been conducted. Some scholars suggest it may date to much later, even the Byzantine period. What is certain is that the symbols carved into this granite slab are unique in the Mediterranean. Nothing comparable exists elsewhere. The altar stands at the heart of an area containing seventy domus de janas, multiple dolmen and menhirs, and sixty Nuragic settlements—a landscape of exceptional prehistoric significance.
Key Figures
Mauro Zedda
Michael Hoskin
Spiritual Lineage
The altar was created by an unknown prehistoric culture, possibly the Ozieri. The site was later Christianized—Byzantine crosses were carved over the prehistoric symbols. The church of Santo Stefano was built opposite in 1492, incorporating Nuragic and Phoenician sacred objects. Today the site is protected as archaeological heritage.
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