ca. 1840 Carolina Augusta Empress of Austria
This is not Empress Elisabeth's nemesis; she was on friendly terms with Sisi according to Wikipedia. Her Wikipedia article is here.
Keywords: 1840, Empress Caroline Augusta, Princess, Empress, Wittelsbach family family, Habsburg family, Austrian, hurluberlu coiffure, feathered lace cap, off shoulder vee neckline, modesty piece, pleated bodice, long puffed sleeves, cuffs, vee waistline, bows, necklace, jeweled bodice ornament brooch, bracelets, fan