From eBay; only a trace of the probable original coloration was left so the image was changed to black and white and the contrast increased.
This shows a Fontanges headdress from the side so the cap can be seen. Her chair appears to have back space for her bustle.
Keywords: 1700, Marie Anne Mancini, Mancini family, La Tour d'Auvergne family, Duchess, Fontanges headdress, ruffled cap, chemise, modesty piece, trapezoidal neckline, under-bodice, tabbed laced over-bodice, vee neckline, three quarter length under-sleeves, engageantes, vee waistline, close skirt, bustle, flounces, coat, elbow length close over-sleeves, shoes, necklace