Grand Duchess Sophie of Saxe-Weimar, née Netherlands in full dress
From Wikimedia.
This dress is hard to date, at least for me. The waist area and sleeves suggest around 1868, although the over-skirt appears to be notched where a vee waistline would normally be.
Keywords: Grand Duchess Sophie of Saxe-Weimar, Oranje family, Wettin family, Princess, Grand Duchess, German, straight coiffure, tiara, lace veil, off shoulder straight neckline, cap sleeves, natural waistline, close skirt, over-skirt, order sash, order star, necklace, Sévigné bodice ornament, bracelets, clasps, fan

