Pauline was the daughter of Dorothea von Medem. Her Wikipedia article is here. Wikimedia posts a black and white print version of this image dated to 1802.
From forum.alexanderpalace.org/index.php?topic=7249.0 Posted by GvE on 19 February 2007.
Grassi portrays Pauline of Sagan wearing the simplest possible dress cinched around her waist by what appears to be nothing more than rope.
Keywords: 1802, Grassi, Pauline of Sagan, Biron family, Hohenzollern family, Princess, curly coiffure, quarter length tight sleeves, cuffs, waist band, Empire waistline, wrap