This is Anne de Chabot. She was the daughter of Count Philippe Chabot de Brion and Françoise de Longwy de Paigny. She married Marquis Charles de Hallwin de Piennes.
From the Alain Truong Web site. Also posted to the Middle 1500s - 1550 to 1590 Album here.
She has tucked the sheer veil of her French hood into the joint between her partlet and bodice.
Keywords: Clouet - François, Anne Chabot, Marquise de Megnelay, Chabot family, Hallwin de Piennes family, Marquise, French, frizzy coiffure, jeweled French hood, sheer ruffled veil, partlet, high neckline, ruff, necklace, fitted bodice, crescent neckline, brooch, draped jeweled bodice ornament, strap sleeves, puffed cloth ornaments, jeweled waist band, natural waistline, virago under-sleeves