From skd-online-collection.skd.museum/de/contents/show?id=1117041; enlarged by half and removed monocolor tint.
The square or sweetheart neckline support the date. The photo taken by Adèle shows the Anhalts spent at least some time in Austria after 1866.
Keywords: Adèle, Princess Adelheid-Marie of Anhalt-Dessau, Adelheid von Anhalt-Dessau, Anhalt von Nassau, Herzogin von Nassau, grande-duchesse de Luxembourg, Ascania family, Nassau-Weilburg family, Duchess, Grand Duchess, curly coiffure, lace veil-wrap, earrings, necklace, bodice, square décolletage, lace lapels, bows