Mor's people captured the threads of her embroidery.
From Wikipedia; I made the image lighter.
Before Michael J. Fox mystified the 1950s world with his vest, Renaissance Ladies were wearing dresses with prominent vests or vest-like covers, as seen in this Mor workshop portrait of Maria de Portugal from around 1550.
Keywords: 1550, Mor, Maria de Aviz, Infanta Maria de Aviz, Duchessa di Parma, Aviz family, Farnese family, Princess, Duchess, straight coiffure, jeweled headdress, high enclosing neckline, neck ruff, ruffles, vest bodice, French sleeves, slashed sleeves, full sleeeves, draped necklace, pendant, earrings