Roman conquest and early administration The region of Vallis Poenina, corresponding to the modern
Canton of Valais between the
Lake Geneva and the
Great St. Bernard Pass, was inhabited at the time of the Roman conquest by Celtic tribes known as the
Vallenses, namely the
Nantuates,
Veragri,
Seduni, and
Uberi. After the Roman invasion led by
Augustus in 16–15 BC, the area was initially placed under military control
(praefectus Raetis,
Vindolicis,
vallis Poeninae) and incorporated into the province of
Raetia et Vindelicia, which stretched between the central Alps and the
Danube.
Formation of the province The Vallensian tribes were granted
Latin Rights and grouped into a single
civitas Vallensium during the reign of
Claudius (41–54 AD). Most scholars associate this period with the beginning of the administrative reorganisation that eventually detached the
Vallis Poenina from
Raetia et Vindelicia and linked it to the
Alpes Graiae, the
Ceutron territory west of the
Little St Bernard Pass. However, an inscription from Claudius's reign shows that the
Vallis Poenina was still under the authority of the procurator of Raetia at that time, and the exact moment when the two Alpine districts were fully united remains uncertain. By the 2nd century, the two regions formed the province of
Alpes Graiae et Poeninae, with Axima (
Forum Claudii Ceutronum, modern
Aime-la-Plagne) serving as the chief town of the Graian division, and Octodurus (
Forum Claudii Vallensium, modern
Martigny) as the centre of the Poenine district. Some scholars date the definitive unification of the
Alpes Graiae and
Alpes Poeninae to the reign of
Septimius Severus (193–211 AD) rather than to the reign of Claudius.
Late Antiquity and Early Middle Ages During the administrative reforms of
Diocletian (284–305), the province was integrated into the
praeses of the
Dioecesis Galliarum. In 381, the first
Bishop of the region, Theodul, was mentioned. After the
Fall of the Western Roman Empire, the region was invaded by the
Burgundians and incorporated into their
kingdom. After its fall, it was integrated into the Frankish Kingdom in 534, then briefly invaded by the
Lombards in 574. == Gallery ==