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 The Supersaxo House This residence was partly built at around 1440, and is the oldest in the town. The Old Town Martigny -Bourg is the oldest inhabited part of the town. Notre-Dame de la Visitation Parish church With its stylistic homogeneity and architectural sobriety, this is one of the best examples of the baroque period in Valais.