Giovanni Vendramini's Wikipedia article is here. I cannot locate a Louis de Saint Aubins active in the decade of the 1800s.
Posted to the Alexander Palace Time machine Discussion Forum by Alexandrina-Sofia on 29 May 2010.
This print is based on her 1807 Mosnier portrait.
Keywords: 1807, Mosnier, Vendramini, Elizabeth Alexeievna, Princess, Tsaritsa, Baden family, Romanov family, Russian, curly coiffure, circlet, ribbon headdress, square décolletage, modesty piece, neckline ruff, lace, tight sleeves, jeweled waist band, Empire waistline, close skirt, order star, order chain, jeweled sleeves, robes