Empress Joséphine Bonaparte's tiaras - $765k

Tiaras owned by Joséphine Bonaparte, the first wife of French Emperor Napoleon, went on sale after 150 years in private hands. Combined, they were expected to fetch up to £500,000 ($680k) at Sotheby'sNapoleon's lovelorn letters to Joséphine are renowned for their passion. She has been depicted as a clever seductress who ultimately relinquished her marriage when she and the emperor were unable to produce an heir.