She wrote Protestant hymns and died before her scheduled marriage. Her German Wikipedia article is here.
From Wikimedia.
Ludmilla wears a dress with a colorful bodice and vee waistline decorated with bows and a tied off wrap around her shoulders. She wears a rug-like head covering made of colored threads.
Keywords: 1660, Countess, Schwarzburg family, German, hurluberlu coiffure, headdress, off shoulder vee neckline, modesty piece, lace, three quarter length upper flared sleeves, cuffs, vee waistline, bows, full skirt, over-skirt, wrist bands, necklace, earrings