From auktionsverket.se-auction-fine-arts-2017-12-12-2138-k-e-makovsky-portrait-of-princess-yurievskaya-?per_page=100&page=6.
Ekaterina wears this complex 1880 dress, not the other way around.
Keywords: 1880, Makovsky, Ekaterina Dolgoroukaya, Princess Yurievskaya, Екатери́на Миха́йловна Долгору́кова, Светлейшая княгиня Юрьевская, Dolgorukov family, Romanov family, Princess, mistress, Alexander II, Russian, straight coiffure, bun, princess over-dress, pleated robings, lace ruffles, three quarter length close sleeves, bows, pleated cuffs, lace cuffs, bracelets, train, under-dress, vee neckline, close skirt, pleated flounces, shoes