This is the Sophie who had her husband stand aside to allow Franz Joseph to become Austria's Emperor and Sisi's foe in Vienna. She was also the ill-fated Emperor Maximillian's mother and mother in law of Empress Carlota.
The portrait is dated 1841, but the dress and a portrait of her holding baby Franz Joseph while wearing the same dress and wrap say 1831 or 1832. The note for her 1832 portrait with baby Franz Joseph states, "Countess Sophia's dress has Gigot sleeves (truncated in this portrait) and a pleated bodice consistent with a bateau neckline in this 1832 Stieler portrait."
Keywords: 1841, Stieler, Archduchess Sophie of Bavaria, Countess, Archduchess, Wittelsbach family, Habsburg family, knotted coiffure, off shoulder neckline, modesty piece, pleated bodice, puffed sleeves, necklace, earrings, wrap