She came from a minor noble family. Her Wikipedia article is here.
From Wikipedia; image made lighter to bring out details.
This is a detail-enhancement of the last image.
Keywords: 1828, Laby, Praefcke, Hohenzollern family, German, bonnet, lace, neckline ruff, vee waistline, criss-cross bodice, epaulettes, quarter length puffed sleeves, cuffs, long outer sleeves, belt, natural waistline, belt, wrap