France · Restored
Fort de Joux
Fort de Joux (Château de Joux) is a medieval castle later transformed into a fort, perched above the Cluse de Pontarlier in the Jura Mountains of France. It developed from an 11th-century keep into a bastioned fortress and served as a prison and military post; it now houses a museum of arms and is a listed monument historique.
Its prime
1693
Today
Restored
As it stood in 1693
The shape it held in its prime.
Perched on limestone ridges above a narrow mountain pass, the complex reads as two linked fortified masses: a broad plateaulike citadel with layered stone curtain walls, terraced glacis and long low barracks capped by steep red-tiled roofs, and a separate rocky outcrop fort with rounded masonry bastions and earth-covered ramparts. A tall rectangular stone keep with a steep pyramidal red tile roof dominates the courtyard range; ashlar masonry is pale local limestone. At prime the roofs, parapets and earthworks are intact and continuous.
Its story
The story of Fort de Joux.
The original castle commanding the Cluse de Pontarlier was built of wood in the 11th century; over the following century the lords of Joux rebuilt the keep and outer fortifications in stone. In 1454 Philip the Good, Duke of Burgundy, bought the château and turned it into a border fort, adding a moat and barracks.
It then passed through Charles the Bold, Mary of Burgundy, Maximilian I, Margaret of Austria and Charles Quint, each owner making improvements, before France annexed it in 1678 under Louis XIV. Its most famous remodeller was Vauban, who modernised the fort between 1678 and 1693. The Austrians captured it in 1814, and the 19th-century forts at Larmont later reinforced the position.
Step inside
10 places to explore in 1693.
The record describes 10 distinct spots at Fort de Joux — including 4 interiors: main keep and inner courtyard, the deep well shaft, prison cells in the keep and more. Create your own photoreal reconstruction and walk through every one — more scenes means more photos, more angles and more rooms of the immersive experience.
Create History
Recreate Fort de Joux with AI to explore it.
The artist rebuilds it as it stood in 1693 — a photoreal walk that belongs to you alone. Pay with coins, no subscription needed.
Recreate Castle to Explore →Whose castle
Clans who held Fort de Joux.
The families that held Fort de Joux for a decade or more across its history — follow a name to its clan.
Joux
Seat of the lords of Joux, who rebuilt the 11th-century wooden castle in stone and held it until Philip the Good, Duke of Burgundy, bought it in 1454.
