From www.wikipaintings.org.
Anna's dress is very simple in this Borovikovsky portrait that may date to around the time she became mistress to the Tsar in 1796.
Keywords: Borovikovsky, Anna Lopukhina, Lopukhin family, Gagarin family, Princess, Russian, mistress, Tsar Paul I, long curly coiffure, scoop neckline, quarter length close sleeves, cuffs, waist band, Empire waistline, wrap