From Wikimedia.
Amélia wears a typical 1840s evening dress with a two layered bertha with a satin band above the sheer flounce. She also wears gently notched sleeves.
Keywords: Dürck, Amelie Leuchtenberg, D. Maria Amélia, D. Maria Amélia de Bragança, Princess, Empress, Beauharnais family, Bragança family, straight coiffure, floral headdress, off shoulder vee neckline, modesty piece, lace, elbow length close notched sleeves, engageantes, bows, vee waistline, full skirt, necklace, earrings, wrap, lining, fur