From Wikimedia; detail-enhancement was tried and did not produce useful results.
This may be an early appearance of two standbys of 1500s fashion - a square neckline surrounding a partlet and a smaller, higher neckline and aglets, the spike-like objects jutting out at the intersections of cloth puffs ornaments.
Keywords: Mary Tudor - Queen of France, Tudor family, Valois family, Brandon family, Princess, Queen, Duchess, straight coiffure, jeweled hat, partlet, high neckline, square neckline, long sleeves, lining, necklace, aglets, bracelets