From Wikipedia; sepia tone removed by gogm.
Wikipedia says 1902, but Donna Caracciolo's sleeves say about 1895. She wears a blouson bodice and circular waistline in this photo.
Keywords: de Meyer - Adolph, Olga de Meyer, Baroness, French, tiara, off shoulder scoop neckline, modesty piece, elbow length leg-o-mutton sleeves, blouson bodice, waist band, natural waistline, full skirt, floral skirt ornaments, choker necklace, necklace, jeweled bodice ornament, brooch, gloves