Empress Eugenie of France is depicted wearing the Greek Key Tiara from the French crown jewels, topped with the Regent Diamond, in a detail of a painting by Jean-Léon Gérôme, ca. 1864; the tiara was sold in the infamous crown jewel auction in 1887

The diamond and emerald tiara made for the Duchess of Angoulême by Bapst, on display with the rest of the French crown jewels at the Louvre Museum in Paris, 2016