Princess Grace of Monaco, pictured with former French Prime Minister Michel Debré, wears a ruby and diamond kokoshnik-style tiara and coordinating jewels at a gala function connected with the restoration of the Palace of Versailles, November 1973; see the suite of jewels, which was borrowed from Van Cleef and Arpels for the occasion, in color here!

Princess Grace of Monaco wears a diamond tiara on loan from Van Cleef and Arpels for the Centenary Ball in Monte-Carlo, May 1966; the tiara is often (incorrectly) said to have been Empress Josephine’s coronation tiara — you can read more about the provenance questions over here!

Princess Grace of Monaco wears her diamond tiara for a gala performance in Paris, April 1967; learn more about the tiara here!