Her genealogical profile is here. Her probable mother's portrait is here.
From bjws.blogspot.com/2013/11/fashion-european-18c-turquerie-wraps; size doubled by gogm.
Mme. de Broglie wears a fur-trimmed wrap over a brocade dress with a split bodice fastened with pearl buttons.
Keywords: 1742, Theodore Elizabeth Catherine, de Besenval, Marquise de Broglie, de Besenval family, de Broglie family, Marquise, French, curly coiffure, tiara, hair jewelry, feather headdress, chemise, modesty piece, scoop neckline, split bodice, buttons, long tight sleeves, wrap, fur, clasps