Centered on the "holy city" of Mandarom, near Castellane in the French Alps, it has approximately 400 members, down from 1200 at its peak.
The village was originally a lordship of Grasse, then of Boniface de Castellane before depending the Count of Provence in 1235 who passed it to Romée de Villeneuve.
It is difficult to know the name of the Gallic people who inhabited the valley nor who were the Civitas on whom the Angles valley depended in the High Empire: Eturamina (Thorame), Civitas Saliniensum (Castellane), or Sanitensium (Senez).
The daughter of Henri de Castellane and Pauline de Talleyrand-Périgord, Marie de Castellane married prince Antoine Radziwill (1833–1904), a member of the House of Lords of Prussia and general à la suite of William I, German Emperor, at Sagan on 3 October 1857.
Between Castellane and the Pont du Galetas, the river passes through the lac de Sainte-Croix, created by construction of a dam of the same name.
De Castellane was brought up by her maternal grandmother and her uncle, Gilles Dufour, one of Karl Lagerfeld’s principal assistants, first at Fendi then Chanel.