The fort of Beauregard is a fortification located in the french city of Besançon.
After two wars (in 1674 when Louis XIV of France took the city from the Spanish, and in 1814 when Austria declared war on Napoleon I), the French military decided to built a fort on Bregille hill, to defend the old city of Besançon. This hill is higher than the principal fortification of the city, the citadel of Besançon. Because the hill's strategic position had been used against the city in the past, the necessity for a real military defense there had become evident, and so the fort was built. In 1791, a first fortification is built, but she was capured in 1814 during the Six Days' Campaign. Jacob François Marulaz takes back the plans and builds a polygonal fort, the first of France, and he was inaugureted in 1870. Later, the fort is abandoned and transformed into public garden.