From Wikimedia.
This appears to date from the middle 1820s or after based on the criss-cross bodice, double sleeves, coiffure with knotted bun, and ferroniere.
Keywords: Delfina Potocka, Komar family, Potocki family, Countess, Polish, neo-hurluberlu coiffure, knotted bun, chemise, ferroniere, trapezoidal neckline, criss-cross bodice, dual upper puffed sleeves, waist band, natural high waistline