Ruby Olive Wreath Tiara

 This nineteenth-century tiara, made with pigeon's blood rubies and olive branch motifs, dates to the reign of George I of Greece; the tiara was worn by his wife, Grand Duchess Olga Constantinovna of Russia. The tiara passed through the Greek royal family and was given to the last Greek queen, Anne-Marie, by her mother-in-law, Queen Friederike. Anne-Marie retains the tiara and wears it frequently today.