The Grand Duchess Vladimir Tiara , This one belonged to Grand Duchess Marie Pavlovna, Nicholas II's aunt. In 1918, when she fled St. Petersburg during the Russian revolution, Marie hid the tiara in her palace. Later, a member of British Intelligence snuck back into the palace, retrieved the tiara, and returned it to Marie. At her death, the tiara passed to her daughter, Princess Nicholas of Greece, who then sold it to Queen Mary of England. It now belongs to Queen Elizabeth II.