Pralognan-la-Vanoise can be reached by Highway D915 which runs east then south from Moûtiers.
In turn for his support in the conflict with Count Odo II of Blois he received the northern Maurienne part of the County of Vienne, then a fief of the Vienne archbishops, as well as territories in the Chablais region and in the Tarentaise Valley, a fief of the Tarentaise archbishops at Moûtiers.
It was developed for the Albertville Olympics of 1992 and can be reached by road, being about 25 minutes drive from Moutiers.
Pope Leo I had regulated the boundaries of the ecclesiastical provinces of Arles and Vienne: under the latter he left the Dioceses of Valence, Tarentaise, Geneva and Grenoble, but all the other dioceses in this district were made subordinate to Arles.