Her Wikipedia article is here.
Sepia tone removed by gogm.
Adelheid's dress has a scoop décolletage made modest by a straight modesty piece. She also wears diaphanous sleeves and a tight skirt.
Keywords: Adelheid of Schaumburg-Lippe, Princess, Duchess, Schaumburg-Lippe family, Wettin family, German, straight coiffure, tiara, scoop neckline, modesty piece, quarter length notched sleeves, tight skirt, necklace, earrings, bracelets