Artist Unknown. Russian. Medium: ivory. Date: 19th Century. Nee princess Charlotte of Prussia (1798-1860), daughter of Frederick William III of Prussia; in 1817 married Grand Duke Nicholas of Russia (1796-1855), Tsar of Russia (1825-55); pearl necklace with emerald clasp was a wedding present from her bridegroom / husband. Provenance: Werner Collection, Luton Hoo, Bedfordshire, UK. Photographic Rights held by The Bridgeman Art Library.