From Wikimedia.
Princess Joanna is dressed for evening in a completely off-shoulder dress and curly bun with tiara in this portrait.
Keywords: 1830, Joanna Grudzińska, Jeanette Grudzińska, Princess Łowicz, Grudziński family, Romanov family, Countess, Princess, Russian, curly coiffure, bun, tiara, off shoulder straight neckline, epaulettes, dual upper puffed sleeves, cuffs, waist band, natural high waistline, necklace, earrings, wrap