Arrondissements of the Côte-d'Or department
The 3 arrondissements of the Côte-d'Or department are: History. In 1800 the arrondissements of Dijon, Beaune, Châtillon-sur-Seine and Semur-en-Auxois were established. In 1926 the arrondissement of Châtillon-sur-Seine was disbanded, and Montbard replaced Semur-en-Auxois as subprefecture. In January 2017 31 communes that were previously part of the arrondissement of Dijon were assigned to the arrondissement of Beaune.