From Wikimedia.
She probably wears an A-line skirt with high waistline in early 20s style.
Keywords: 1822, Smirnovsky, Ekaterina Dmitrievna Golitsyna, Ekaterina Dmitrievna Dolgorukova, Екатерина Дмитриевна Голицына, княгиня Долгорукова, Golitsyn family, Dolgorukov family, Princess, Russian, curly coiffure, braided bun, earrings, Empire bodice, bateau neckline, lace modesty piece, quarter length full sleeves, waist band, Empire waistline, A-line skirt, wrap