Origin and history
The fortifications of Briançon, designed by Vauban and realized under Louis XIV, form an exceptional defensive ensemble adapted to the alpine relief. They include the urban enclosure, the forts of the Salettes, the Trois-Têtes and the Randouillet, as well as the bridge of Asfeld (1729-1731), a masterpiece of military engineering crossing the Durance 56 metres high. These works, classified at UNESCO in 2008, illustrate the strategic adaptation to mountain constraints to counter invasions from Italy via the Col de Montgenèvre.
The city, already mentioned as Braigantion by Strabon in the 1st century BC, occupied a key position on the Roman way from Gaul to Italy. In the Middle Ages, Briançon developed as a fortified village under the Dolphins of Vienna, obtaining in 1343 a charter of franchises granting him remarkable autonomy. The current fortifications were mainly built after 1692, when Vauban, alarmed by the Savoyard raids, proposed a defensive system exploiting the surrounding heights.
The Asfeld bridge, named in honour of its builder, the Marquis d'Asfeld, is an emblematic element of the system. 60 meters long and 4 wide, it linked the city to the forts of the Heads and Salettes, allowing total control of access. The work, carried out between 1729 and 1731, mobilized innovative techniques for the time, such as the use of scaffolding suspended above the vacuum. This bridge symbolizes the audacity of 18th-century military engineers.
In the 19th century, the fortifications were modernized by General Haxo, then by Séré de Rivière in the 1880s, to cope with the progress of artillery and tensions with Italy. The Infernet Fort, built at 2,380 metres above sea level, then became the highest in Europe. These adjustments reflect the continuing strategic importance of Briançon, a border town after the Treaty of Utrecht (1713), which set the limit at Montgenèvre Pass.
Briançon's military vocation declined in the 20th century, particularly after the closure of the National Centre for Mountain Warfare in 2009. Today, the fortifications, classified as a protected area since 1987 and labeled City of Art and History, attract tourists for their architectural heritage and landscape integration. Their preservation is ensured by restoration programmes, such as the one carried out on the ramparts in the 1980s.
The 2008 UNESCO ranking, along with eleven other Vauban sites, strengthened Briançon's international reputation. The fortifications are presented as a model of military adaptation to a mountain environment, combining technical innovation and respect for the territory. Their history also reflects the geopolitical changes in the Alps, between Franco-Savoyard conflicts and current cross-border cooperation.
Guided tours highlight elements such as communication Y, an underground passage connecting the forts, or the casemates dug into the rock. These vestiges tell the evolution of siege techniques, from 17th century guns to 20th century blockhouses. The city museum also maintains original models and plans of Vauban, reflecting the accuracy of its projects.
Briançon also owes his fame to his role in the history of military skiing. At the beginning of the 20th century, the 159th Alpine Infantry Regiment, set up in the city, founded the first ski school in France (1903), inspired by Norwegian techniques. The fortifications then served as training ground for the soldiers, foreshadowing the Alpine fighter units. This double identity, both fortified city and cradle of alpine skiing, enriches its heritage.
Finally, the fortifications are part of a wider cultural landscape, including the medieval old town and its religious buildings such as the Collège Notre-Dame (17th century). Their preservation is accompanied by urban projects, such as the rehabilitation of the Berwick Barracks in the eco-neighborhood, illustrating the transition from a military city to a sustainable tourist and residential destination.
