Rennes-le-Château is a commune approximately 5 km south of Couiza, in the Aude department in the Occitanie region in Southern France. In 2018, it had a population of 91.
This hilltop village is known internationally; it receives tens of thousands of visitors per year, drawn by conspiracy theories surrounding a putative buried treasure discovered by its 19th-century priest Bérenger Saunière, the precise nature of which is disputed among those who credit its existence.
Wikipedia https://en.wikipedia.org/wiki/Rennes-le-Château
Coordinates 42°55'38.091" N 2°15'45.883" E