She became a Nazi supporter. She hid an SS officer and his wife at the end of World War II. Back then, nasty people called "allies" were picking on those nice SS people for some reason. Her Wikipedia article is here.
Pauline's dress has sleeves tacked to its straps in this 1898 photo and a bodice with vertical, instead of horizontal, pleats.
Keywords: 1898, Pauline of Württemberg-Wied, Württemberg family, Wied family, Princess, German, straight coiffure, square neckline, quarter length flared sleeves, waist band, shallow vee waistline, A-line skirt, floral bodice ornament, necklace, bracelets