Citadel of Besançon

The Citadel of Besançon is a significant 17th-century fortress located in the Franche-Comté region of France. Renowned as a masterpiece of military architecture, it was designed by the famed engineer Sébastien Le Prestre de Vauban. Perched on Mount Saint-Etienne, one of the seven hills overlooking Besançon, the Citadel occupies 11 hectares (27 acres) and commands a strategic position on an oxbow bend of the river Doubs, a location recognized for its military importance since at least 58 BC.

Historical Significance and Construction

The promontory on which the Citadel stands has a history of fortification dating back to Gallo-Roman times. Medieval and 16th-century renovations preceded the major construction phase that began in 1668 under Spanish initiative. Following the Treaty of Nijmegen in 1678, Louis XIV ordered significant enhancements to Besançon's defenses, appointing Vauban to redesign the Citadel. Construction, supervised initially by Ambrose Precipiano, took place in stages, with the fortress evolving into one of the period's most formidable defenses by 1711. The sheer cost of its construction led to a famous anecdote where the king questioned if Vauban was building it with gold.

Military Architecture and Design

Vauban's design is characterized by its intricate system of successive bastions, or fronts, surrounded by walls, covered pathways, watchtowers, and sentry posts. The walls are imposing, reaching 15 to 20 meters in height and 5 to 6 meters in thickness. The fortress incorporates advanced defensive features, including half-moons, ditches, and strategically placed bastions designed to provide comprehensive surveillance and firing angles. The Royal Front and Relief Front, originally built by the Spaniards, were later incorporated and modified by Vauban. The design emphasizes the integration of the fortifications with the natural topography to create a robust defensive network.

Recent History and Current Use

In subsequent centuries, the Citadel served various roles, including as a prison for figures like "La Voisin's" accomplices and Royalists during the French Revolution, and as a garrison. It notably withstood attacks in 1814 and 1871 with minimal damage. During World War II, it was occupied by German forces and used for executions of resistance fighters. After the war, it initially served as a military depot before the city of Besançon acquired it in 1958.

Today, the Citadel is a major tourist attraction, drawing between 200,000 and 300,000 visitors annually, making it the most visited monument in the Bourgogne-Franche-Comté region. It has been transformed into a vibrant cultural center, housing several museums. These include the Museum of the Resistance and Deportation, a museum dedicated to the traditional life and archeological history of Franche-Comté, and an extensive Museum of Natural History. The latter features a zoo with endangered species like the Asian lion and Siberian tiger, an insectarium (the largest in France), an aquarium focusing on local fish and conservation, a noctarium for nocturnal animals, vivariums, botanical gardens, and a children's farm. The Citadel, along with Fort Griffon, was recognized as a UNESCO World Heritage Site in 2008 for its outstanding testimony to Vauban's military engineering and its lasting influence on fortification design. It has also been listed as a French Monument historique since 1942.