From Wikimedia.
Elena wears an evening dress with long lace engageantes in this 1837 Hau portrait.
Keywords: 1837, Hau, Elena Pavlovna née Württemberg, Grand Duchess, Württemberg family, Romanov family, Russian, hurluberlu coiffure, ferroniere, off shoulder vee neckline, modesty piece, pleated bodice, elbow length notched sleeves, engageantes, lace, vee waistline, full skirt, bracelets, clasps, wrap, fur