From Wikimedia.
Maria wears a simple dress over a chemise with a high stand up collar for her 1797 Borovikovsky portrait.
Keywords: 1797, Borovikovsky, Maria Lopukhina, Lopukhin family, Russian, long curly coiffure, chemise, square neckline, collar, over-dress, scoop neckline, long tight sleeves, waist band, bows, Empire waistline, close skirt, bracelets, wrap