Medieval county, on the borders of France, belonging to the Kingdom of Burgundy (the Empire from 1032), named after a town, which stands on the left bank of the River Saône, ESE of Dijon and west of Besançon, now in the Department of Côte d’Or.
After the death of William IV, Count of Burgundy, in 1155, that County passed to his elder brother’s daughter, Beatrice, who was the betrothed of the Emperor Frederick Barbarossa, while his son, Stephen II, was compensated with the County of Auxonne. In 1237 Stephen II’s aged son, Stephen III, and grandson, John of Chalon, exchanged lands with the Duke of Burgundy, including Auxonne.
There was one great advantage to the Dukes of Burgundy in their acquisition of this County that was legally, if not practically, within the Empire. It allowed the Dukes to evade the French royal ordinances forbidding the minting of coin: they minted it at Auxonne in the Empire instead. When the Capetian Dukes died out in 1361 King John the Good closed the Auxonne mint down and opened a royal mint in Dijon, the capital of the Duchy, but his son, Philip the Bold, the first Valois Duke of Burgundy, reopened the mint at Auxonne in 1378.
After the death of the last Valois Duke in 1477 Auxonne was held by the King of France and this was accepted by Maximilian I, King of the Romans and widower of the Burgundian heiress, in the Treaty of Senlis, 1493.