A 5,000-year-old canvas underfoot
On a patch of land next to a housing estate in West Dunbartonshire lies one of Europe's most significant pieces of Neolithic art, but you cannot see it. The Cochno Stone is a massive, flat-topped sandstone slab, measuring approximately 13 by 8 meters (43 by 26 feet). Its surface is covered with about 90 carvings known as cup-and-ring marks. These designs, dating back roughly 5,000 years to the Neolithic or Early Bronze Age, consist of a central cup-like depression surrounded by concentric circles.
The petroglyphs, or rock carvings, are not limited to these abstract shapes. The stone also features a prominent ringed cross and, more unusually, a pair of four-toed feet. The purpose of the symbols is unknown and subject to many interpretations. Theories range from the stone being a territorial marker or a record of land ownership to a site for sacred rituals. Some researchers have suggested the complex patterns could be a map of the surrounding landscape or even an astronomical chart.
The stone was first documented by the Reverend James Harvey in 1887. Its fame grew, but increased public access led to its decline. By the mid-20th century, the prehistoric carvings were being damaged by people carving their own names and symbols onto the stone. To prevent its complete destruction, archaeologist Ludovic Maclellan Mann made the decision to bury the entire slab under several feet of earth in 1965.
Digital resurrection
For 50 years, the Cochno Stone remained hidden. In 2016, a team led by Dr. Kenny Brophy from the University of Glasgow received permission to re-excavate the site for a brief two-week period. The goal was not a permanent display but to create a precise digital record of its surface before reburying it.
Collaborating with digital scanning experts from the Factum Foundation, the team employed cutting-edge 3D-imaging technology. Using techniques like photogrammetry and laser scanning, they created a high-resolution digital model of the stone. This process captured every detail, from the 5,000-year-old carvings to the 20th-century graffiti and even the remnants of paint applied by Ludovic Mann in 1937 for his own studies.
This digital facsimile now allows researchers worldwide to study the stone without risking further physical damage. The original remains safely underground, a protected treasure whose story spans millennia. The 3D model preserves the ancient art but the entire history of human interaction with the stone, from its creation to its modern rediscovery and desecration. After the project was completed, the Cochno Stone was once again covered with soil, where it remains today.