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Origin and history

The spoulga d'Alliat is a fortified cave, called spoulga (of the old occitan spelunca, meaning cave or cave), characteristic of the Pyrenees, especially in Ariège. These structures, barred by a wall and located in height to exploit their natural defences, were economic alternatives to traditional castles. Their development in the 12th century coincided with the expansion of Comtal fortifications in the region, posing financial challenges to the Counts of Foix. Spoulgas, mentioned in medieval acts under the terms cauna, spelonca or espulga, were strategic points for controlling the territory.

An act dated 27 January 1213, at the council of Lavaur, lists six caunas (fortified groves) among the possessions of Count Raymond-Roger de Foix, transferred to Peter II of Aragon before the battle of Muret. These include Alliat, alongside Soulombrie, Ornolac, Verdun, Niaux and Subitan. These caves, often omitted from written documents, have been studied by historians such as Adolphe Garrigou (19th century) and Florence Guillot, whose prospecting revealed about twenty additional sites in Ariège. Their exact role — a refuge, a watchtower or a place of storage — remains partially interpreted, but their concentration in mountainous areas suggests an adaptation to the local conflicts and defensive needs of the time.

Spoulgas are part of a wider network of fortified caves in Central Europe, the Mediterranean and the Middle East, with a particular density in the Spanish Pyrenees. In Ariège, their construction reflects the political and military tensions of the Middle Ages, including rivalries between the Counts of Foix and the neighboring kingdoms. Their rudimentary architecture — a wall barring entry and sometimes internal developments — is evidence of pragmatic defensive engineering, exploited by communities seeking to protect themselves with limited means.

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