When in the Year of Our Lord 1034 Saint Bernard of Menton entered the Canons of the Cathedral of Aosta, he was commissioned to build two new hospices for wayfarers: one along the road called Mont Joux (Great Saint Bernard Pass) and one to serve the road called Colonne Joux (Little Saint Bernard Pass). When Saint Bernard arrived in these places he found many pagan temples. One of these stood just beyond the Cromlech and was composed of a shrine and a triple external colonnade. On the highest of the columns was placed a magnificent stone of intense red color that had the power to capture the light of the dying sun on the day of the Equinox, creating flashes over a large part of the esplanade of the Hill. Called the eye of Graius and then the eye of Jupiter, it had been positioned at the time of the Salassi to worship their deities. According to legend, it was Saint Bernard himself who suppressed this pagan symbol by destroying the stone. In its place, a simple iron cross was first placed, then a statue of the saint.
This temple, of which only the foundations remain, was discovered in the 1930s during one of the first excavation campaigns at Colle. Numerous finds came to light (now exhibited at the Regional Archaeological Museum in Aosta), including silver plaques, coins, a votive plaque dedicated to Hercules and a silver bust depicting Jupiter Graioceles.