Louise, Grand Duchess of Baden by J. Spelter (auctioned by Christie's)
Spots in background removed with Photoshop by gogm.
Spelter apparently copied Winterhalter's 1857 portrait of Louise of Prussia.
Keywords: 1857, Winterhalter, Spelter, Luise of Prussia, Princess, Grand Duchess, Hohenzollern family, Baden family, German, straight coiffure, floral headdress, off shoulder vee neckline, modesty piece, bertha, lace, quarter length full sleeves, bows, vee waistline, crinoline, order bows, necklace, bracelets, wrap