Carcassonne is a French fortified city in the department of Aude, in the region of Occitanie. It is the prefecture of the department.
Inhabited since the Neolithic, Carcassonne is located in the plain of the Aude between historic trade routes, linking the Atlantic to the Mediterranean Sea and the Massif Central to the Pyrénées. Its strategic importance was quickly recognized by the Romans, who occupied its hilltop until the demise of the Western Roman Empire. In the fifth century, it was taken over by the Visigoths, who founded the city.
Wikipedia https://en.wikipedia.org/wiki/Carcassonne
Coordinates 43°12'46.929" N 2°20'56.785" E