About twenty kilometers from Carcassonne, at the foot of the Montagne Noire, Saint-Martin-le-Vieil is marked, like many surrounding sites, by its medieval past.
The village is distinguished by three entities: the castle, the church and the abbey, not to mention the "cruzels", foundation of a troglodyte habitat unique in the Aude. Its origins go back to the 8th century: its habitat (may be a monastic cell) which was Saint Martin on Lampy, its name at the time, was linked to the presence of an abbey located near the current Montolieu. In the twelfth century the place is given to the new abbey Villelongue (around 1165) and it is in 1678 that appears for the first time the name of St Martin the Old, transformed much later in Old.