Milestone A Roman milestone engraved in the name of the Emperor Constantine. This milestone stands against the chancel of the parish church and indicates the distance to the centre of Rome. Opening hours Freely available Suggestions Monumental stained-glass window by Edmond Bille Situated at the heart of the Town Hall, this great stained-glass window reminds us of Martigny's past. Saint-Maurice Abbey Discover 1500 years of history via an outstanding visit to the Royal Abbey of St Maurice. Rue de la Basilique Limited excavations have enabled the 14 metres by 15 metres rue de la Basilique to be highlighted.