From Wikimedia.
The pleating of Maria's bodice extends all the way to the waist band of her dazzling white dress in this 1827 portrait. Her coiffure is as straight as any seen in the 1840s or 1850s, but the big knot is consistent with 1827.
Keywords: 1827, P. v. S., Maria Castaldo, Maria Tapp, Tapp family, Castaldo family, straight coiffure, knotted coiffure, floral headdress, modesty piece, straight neckline, pleated bodice, dual upper-puffed sleeves, cuffs, waist band, natural waistline, full skirt, earrings, wrap