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Origin and history

The Forclaz-du-Prarion is an ancient Roman border pillar erected in 74 AD at the Forclaz-du-Prarion pass, between the territories of the Allobroges (Vienna, province of Narbonnaise) and the Ceutrons (Greek Alps). It also materializes a provincial border under the Roman Empire. Stained in local gneiss, it bears a Latin inscription commissioned by Emperor Vespasian and executed by his legate Cn. Pinarius Cornelius Clemens, propreter of the army of superior Germania.

Discovered in 1852 at the place called Larioz, near the pass, the terminal was moved shortly afterwards to the hamlet of Plagnes (Commune of Passy). Since 1999, a facsimile has been displayed in the garden of the church of the Plagnes, while the original, protected by an edicle, is in front of the former Hotel des Panoramas. Latin inscription details the imperial authority and the territorial delimitation function, stressing its administrative and symbolic role.

Ranked a historic monument in 1875, this pillar illustrates the Roman organisation of the Alps and the management of internal borders. His epigraphic text explicitly mentions the cities concerned (Viennenses and Ceutronas) and the political context of his creation, during the reign of Vespasian. The boundary also bears witness to Roman practices of territorial marking, combining practical utility and affirmation of imperial power.

Today, the original monument and its copy allow us to study Roman stone-cutting techniques and epigraphy, as well as the history of Alpine exchanges in ancient times. Its displacement in the 19th century reflects the challenges of preserving the archaeological heritage, then in full rediscovery in Savoie.

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