The Hiéron du Val d'Or (English: "Sanctuary of the Golden Valley") was a Catholic esoteric secret society in France, which existed from 1873 until 1926.
The group was founded in 1873 near the shrine at Paray-le-Monial, historical Burgundy, where St. Marguerite-Marie Alacoque had visions of the Sacred Heart of Jesus, establishing the popular devotion.
The Hiéron attempted to demonstrate the origins of Christianity in the mystical Atlantis, worked to prepare the way for the social political reign of Christ the King in the year 2000 and devoted themselves to the name aor-agni ("light-fire").
One of the collaborators of the de Naoillats; Jeanne Lépine-Authelain; corresponded with the esotericist Paul Le Cour who displayed an interest in the Hiéron's claims about Atlantis.
The Hiéron du Val d'Or held significance of certain images or dates such as the octopus which stood for the inconsistency of man while The Sacred Heart stands for an abyss of constancy and fidelity.