The Great Saint Bernard Pass is the lowest pass lying on the ridge between the two highest mountains of the Alps, Mont Blanc and Monte Rosa. At 8,100 ft high, it connects Martigny in the Swiss canton of Valais, with Aosta, Italy. The Little Saint Bernard Pass, 7,178 ft high, straddles the French–Italian border and connects Savoie, France to the Aosta Valley.
While no one is sure of the exact route that Hannibal used, based on the limited descriptions written by classical authors, many a full century after the event, most historians now believe that Hannibal used the Little Saint Bernard Pass.
At the Great St. Bernard Pass, a cross inscribed with Deo optimo maximo, to the best and greatest god was placed where the temple had been. The bronze statue of St Bernard stands where the mansio was. Coins dating back to the reign of Theodosius II, in the 1st half of the 5th century are now on display in the museum of the nearby hospice, while some of the buildings in the village of Bourg-Saint-Pierre 7 1/2 miles north, on the Swiss side of the pass, contain fragments of the marble temple.