Her Wikipedia article is here.
Photo - Daniel Arnaudet and Gérard Blot
Mademoiselle Blois wears a dress with an under-bodice flanked by elaborate frogging that continues down her skirt in this de Troy portrait. her coiffure includes a curl above each eye, a feature that would persist for about 30 more years.
Keywords: 1680, de Troy, Arnaudet, Blot, Marie Anne de Bourbon légitimée de France, Princess, Duchess, Bourbon family, French, long high straight coiffure, jeweled headdress, trapezoidal neckline, under-bodice, split bodice, frogging, tassels, elbow length notched flared sleeves, engageantes, lace, vee waistline, train