Established on the occasion of the marriage of King Francis I to Eleanor of Habsburg, his second wife, the institution of the Crown Jewels of France experienced three and a half centuries of acquisitions, but above all twists and turns. Deeply affected during the Revolution, then definitively dispersed at auction in 1887, they continue to arouse the fascination of collectors and historians alike given their many secrets and mysteries. Similarly, while some of the most beautiful pieces of the collection are now preserved in the Galerie d'Apollon of the Louvre, others are still awaiting rediscovery and remain eagerly sought after.