For decades, a small, weathered limestone slab displayed in a Dutch museum was largely overlooked, considered a fragment of architectural debris. Recent research, however, suggests that this artifact is actually the playing surface of an ancient Roman board game, shedding new light on pastimes enjoyed beyond the famed arenas and baths of Rome.
The 8-by-6-inch (15-by-20-centimeter) stone, housed at the Het Romeins Museum in Heerlen—once the Roman settlement of Coriovallum—features a distinct pattern of rectangles and lines. Archaeologist Walter Crist of Leiden University in the Netherlands, who specializes in ancient games, first noticed the object during a 2020 visit. He observed subtle wear marks on the surface, indicating repeated movement of game pieces rather than mere decorative engraving.
To decode the artifact's purpose, Crist and colleagues employed high-resolution scanning to detect microscopic grooves that suggested commonly traveled paths on the board. They then utilized Ludii, an artificial intelligence platform trained on records of roughly 100 ancient Roman games, running 130 rule combinations and thousands of simulated matches. This computational approach identified nine plausible rule sets consistent with the stone’s wear pattern, pointing toward a blocking-style game in which players aimed to trap their opponent in corner sections of the board.
The reconstructed game, provisionally named ludus coriovalli or the Coriovallum game, is characterized by asymmetrical play and strategic complexity previously thought to have emerged only centuries later. Players would have slid small pieces made of glass, bone, or pottery along engraved lines, engaging in a contest of tactical immobilization.
Historical evidence confirms that ancient Romans frequently enjoyed tabletop games such as rota (similar to tic-tac-toe), ludus calcurom (akin to Gomoku), and ludus latrunculi (a precursor to chess). Yet scholars have struggled to reconstruct exact rules from surviving boards or written descriptions, as many games were ephemeral or played on perishable materials.
The findings, published in the journal Antiquity, have drawn interest and debate within the archaeological community. Veronique Dasen of the University of Fribourg, who was not involved in the study, emphasized the potential of emerging technologies to reveal lost aspects of ancient play culture, suggesting that other overlooked objects might similarly represent forgotten games.
Conversely, Ulrich Schadler, also from the University of Fribourg and director of the Swiss Museum of Games, expressed skepticism about identifying the Heerlen stone as a genuine game board. Schadler noted the artifact’s straight-edged, disconnected lines depart from known Roman board designs, proposing it could be an incidental geometric carving rather than intentional gameplay.
Crist responded by highlighting the artifact’s uniqueness as evidence of a localized tradition on the Roman Empire’s periphery, contrasting with more ornate urban examples. He underscored that absence of written rules does not preclude a game’s existence and advocated for integrating material analysis with innovative methods to explore these silent fragments of history.
The research offers a novel perspective on ancient recreation, illustrating how digital tools can revive long-forgotten pastimes and deepen understanding of everyday life in the Roman world.