The event was organised by French philosopher Abdennour Bidar, the president of the "Fraternite generale" association, and marks the 2nd edition of the movement.
Organisers said the aim was to promote fraternity through cultural, educational and civic actions in France. It said most of the participants were local students and pupils, as well as sports teams from the area.
The Cité de Carcassonne, a stunning medieval fortress in the Aude department, is one of France's most popular tourist destinations.
And it featured in The Local's own list of The one thing you absolutely must see in every department of France. See the full (and long) list here.