From Wikimedia; spots throughout image removed with Photoshop by gogm.
Elizabeth wears a plain dress, perhaps a sheath, made using luxurious materials including lace cuffs. The medallion she holds is probably a cameo of Catherine II.
Keywords: 1795, Ritt, Elizabeth Alexeievna, Princess, Tsaritsa, Baden family, Romanov family, Russian, long curly coiffure, trapezoidal waistline, modesty piece, lace, scarf, long tight sleeves, back-flared cuffs, waist band, sheath, wrap