Sotheby’s names her as Marie-Louise de Beaurepaire, but geni.com identifies the comtesse de Beaurepaire as Marie Thérèse Robertine de Lannoy. The information in the keywords is based on the information provided by geni.com.
From the Sotheby’s Web site; exposure substantially increased.
Coiffures are rising in 1776, but not to the extent that large curls are needed to deal with the excess. The skirt is unsupported.
Keywords: 1766, van Loo, Marie-Louise de Beaurepaire, Marie Thérèse Robertine de Beaurepaire, Marie Thérèse Robertine de Lannoy, de Lannoy, comtesse de Beaurepaire, de Lannoy family, de Beaurepaire family, straight coiffure, floral headdress, chemise, modesty piece, trapezoidal neckline, three quarter length under-sleeves, cuffs, bodice, vee décolletage, three quarter length close over-sleeves, floral bodice ornament, full skirt, wrap, theatrical dress