Toponymy
The city is first recorded in 58 BC as Vesontio in the Book I of Julius Caesar's Commentarii de Bello Gallico. The etymology of Vesontio is uncertain. The most common explanation is that the name is of Celtic origin, derivated from wes, meaning 'mountain'. During the 4th century, the letter B took the place of the V, and the city name changed to Besontio or Bisontion and then underwent several transformation to become Besançon in 1243.
Ancient history
The city sits within an oxbow of the Doubs River (a tributary of the Rhône River); a mountain closes the fourth side. During the Bronze Age, c.1500 BCE, tribes of Gauls settled the oxbow.
From the 1st century BC through the modern era, the town had a significant military importance because the Alps rise abruptly to its immediate south, presenting a significant natural barrier.
The Arar (Saône) River formed part of the border between the Haedui and their hereditary rivals, the Sequani. According to Strabo, the cause of the conflict was commercial. Each tribe claimed the Arar and the tolls on trade along it. The Sequani controlled access to the Rhine River and had built an oppidum (a fortified town) at Vesontio to protect their interests. The Sequani defeated and massacred the Haedui at the Battle of Magetobriga, with the help of the Arverni tribe and the German Suebi tribe under the Germanic king Ariovistus.
In historic times the town was first recorded in the journals of Julius Caesar, in his commentaries detailing his conquest of Gaul, as the largest town of the Sequani, a smaller Gaulic tribe; Caesar gave the name of the town as Vesontio (possibly Latinized), and mentions that a wooden palisade surrounded it.
Over the centuries, the name permutated to become Besantio, Besontion, Bisanz in Middle High Germanand gradually arrived at the modern French Besançon. The locals retain their ancient heritage referring to themselves as Bisontins
