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Origin and history

Fort Lagarde is a 17th century citadel built in Prats-de-Mollo (now Prats-de-Mollo-la-Preste), in the Eastern Pyrenees, 13 km from the Spanish border. Designed to monitor the Col d'Ares and protect the city after the linking of the Roussillon with France by the Treaty of the Pyrenees (1659), it embodies the adaptation of Vauban's bastion system to mountain constraints. Ranked a historical monument in 1925, it combines a pre-existing medieval tower (11th century) with modern defensive works, such as a star dungeon or an underground connecting the fortress to the city.

Originally, the site housed a tower with Aragonese signals ("the Tower of the Guardia", 1307), later integrated into the dungeon. After the Angelets de la Terra revolt (1663–72) against the gabelle, Louis XIV ordered the reinforcement of the defences. Vauban, accompanied by the engineer Rousselot de Monceaux, led the work from 1677, but the initial project remained incomplete due to lack of resources. The fort, partially operational, resisted its first siege in 1793 during the war against Spain, before being restored by the commune after 1976.

The construction spans more than a century, mixing local granite, shale and brick. The vulnerable western front is protected by a place of weapons and a cross called "Mhomet tomb". A covered road and an underground of 142 steps (18th century) connect the fort to the city, allowing soldiers to retreat in case of attack. Despite its strategic role, the fort experienced only one major military episode in 1793–94, before its progressive disarmament.

Architecturally, Fort Lagarde illustrates the transition between medieval towers and bastioned fortifications. His starry dungeon, surrounded by counterguards and reindeer (like that of Sainte-Marguerite), shows Vauban's influence, although the initial plans were reduced. The primitive tower, preserved in the centre, symbolizes this superposition of the epochs. Today, the site bears witness to the border tensions between France and Spain in the 17th to 18th centuries.

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