Wikipedia has this image showing large curls to the side and an Apollo knot on top as an example of 1820s hair fashion.
Keywords: 1828, Kiprensky, Anna Olenina, Olenin family, Countess, Russian, curly coiffure, Apollo knot, off shoulder vee neckline, modesty piece, pleated bodice, puffed sleeves, waist band, natural high waistline, necklace, earrings, wrap