The city of Besançon is also called "Baisonn", and is located in eastern France in Doubs, which is the capital of Franch-Comté, and the city played an important role in Roman times, and the geographical terrain made it an important military stronghold in eastern France, especially as it is on the border with Switzerland. A political center and a religious capital since ancient times, it was also chosen as the most green city in France due to the abundance and diversity of its trees and natural spaces.