Via Agrippa

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Via Agrippa, is any stretch of the network of Roman roads in Gaul that was built in the last century BCE by Marcus Vipsanius Agrippa, to whom Octavian entrusted the reorganization of the Gauls. In all, the Romans built 21,000 kilometres (13,000 mi) of roads in Gaul. Agrippa's network radiated from a hub at the new strategic site of Lugdunum (Lyon). Strabo indicated the directions, which were identified by Pierre Gros: Though the detailed routes taken by the various stretches of the Via Agrippa are well settled on the ground, the dates of construction are still debated: in 39-38 BCE, according to the authors of the Guide romain antique; 22-21 BCE, according to Pierre Gros; or between 16 and 13 BCE, according to Paul Petit. An ancient salt road passed to the mouths of the Rhône, keeping to the lower slopes of the hills to avoid the river's sometimes swampy flood plain. Under the impetus of Augustus, Agrippa paved a route that lay closer to the river, passing through the important Roman cities of Arles, Avignon, Orange, Montélimar, Valence, Vienne, interspersed with relay stations (mutationes) where a change of horses was maintained for official couriers. This route was augmented by the Via Antonina along the right bank of the Rhône. Near Valence, the modern Route nationale 7 follows the track of the via Agrippa. To the north of the Isère the via Agrippa, having passed the crossroads still called Sept Chemins ("Seven Roads") followed the line now marked by Route départementale 101 towards Beaumont-Monteux; there a Route communale and a pathway trace the straight Roman track which serves as boundary between the communes of Beaumont-Monteux and Pont-de-l'Isère. Nearby, the toponym Vie Magne records the passage of the via magna, the "great road".