Saint-Hilaire is a pretty village of ancient stone buildings and a more-ancient abbey, nestled in the first hills that rise from the plain of Carcassonne until they become the mountains of the Pyrénées. 
The Benedictine abbey began early in the 9th century, when King Louis I, son of Charlemagne, granted it a charter. Louis was nicknamed “the Fair,” “the Debonaire” and “the Pious,” which is an interesting combination indeed.The abbey is mostly famous for having claim to the first documented existence of bubbling wine, which was made at the abbey but which is known as blanquette de Limoux, after a nearby town. 
Despite the abundance of bubbly, life wasn’t so good for the monks. You would think that, being monks, they would have come out well in the crusade against the Cathars in 1209, but instead they got into a fight against the formation of a Dominican abbey down the road in Prouilhe–the “cradle of the Dominicans.” 
By the 1300s, money was tight, but the plague, the 100 Years’ War and roving mercenaries called routiers forced the monks to fortify the abbey into a military outpost. A real litany of threats that make a person happy to be living in the 21st century.
Things went from bad to worse: by the 1500s, François I persuaded the pope to let the king appoint the lead monk instead of the monks themselves. Such monks usually were aristocrats and didn’t have to follow any of the order’s rules or even live at the abbey. The money problems worsened. I didn’t find out whether the monks sold their wine, but the idea that prices would naturally go up wasn’t accepted any better than the idea that gravity pulled objects to the ground or that the earth revolved around the sun. Prices were considered to be immutable, and you weren’t allowed to raise them.
By 1748, the monk left. The abbey’s church was used by the village and its cloister used as the village square. The abbey was sold off before 1800, as were many religious institutions after the Revolution.
There’s a legend that outside Saint-Hilaire, the monks had a little country getaway, which fell to ruin and disappeared after 1748. On a Christmas night centuries later, before the Great War began, a local man passed through the moonlit domaine and heard bells ringing. But no bells were within earshot. Then he heard singing, and witnessed a procession of ghostly monks.
It does seem like the kind of place where, if ghosts exist, you might find them.
The abbey is really pretty and open for visitors all year. A peaceful haven.
Taste of France 