There are two oppida at Mures and Chastellard. At Font-Crémat, a Gallo-Roman villa and a necropolis have been discovered. A treasure of 700 denarii from Nero to Geta was discovered in a vase in 1909 as well as many other unrelated discoveries. During the Pax Romana the iron manufacturing workshops became established in the commune territory. Throughout this period the territory of Banon was part of that of the "Sogiontiques" (Sogionti) whose territory spanned south of the Baronnies of the Durance. The Sogiontiques were federated to the Vocontii and, after the Gallic Wars, they were attached with them to the Roman province of Gallia Narbonensis (now Narbonne). In the 2nd century they were detached from Voconces and formed a distinct civitas with "Segustero" (Sisteron) as its capital.