She was the daughter of Prince Adalbert of Bavaria (1828-1875).
Upgrade image posted 3 April 2016 from Miss Mertens' photostream on flickr; upper edge fixed with Photoshop and sepia tone removed and size fixed at 32 cm high at 28.35 pixels/cm.
Princess Klara wears a columnar dress with lace or open work lapels and three-quarter sleeves in this photo, probably from the 1910s.
Keywords: Princess Klara of Bavaria, Wittelsbach family, Princess, German, straight coiffure, vee neckline, lapels, lace, three quarter length sleeves, belt, jeweled buckle, tight skirt, necklace