1846 Duchesse d'Aumale by Franz-Xaver Winterhalter studio (auctioned by Christie's)
From Wikimedia; a few spots in the background, spots along the left edge, and a flaw at the base of the step removed with Photoshop by gogm.
This is a copy of the portrait in the last image.
Keywords: 1846, Winterhalter, Duchesse d'Aumale, Princess, Duchess, Orléans family, Bourbon family, straight coiffure, floral headdress, off shoulder vee neckline, modesty piece, bertha , lace, pleated bodice, elbow length puffed sleeves, engageantes, vee waistline, full skirt, flounces, shoes, bracelets, wrap