From bjws.blogspot.com/2013/01/1500s-gossip-isabella-isabel-clara; spots along left and right side and background removed with Photoshop by gogm.
This is probably based on the preceding portrait.
Keywords: Coello, Infanta Isabel Clara Eugenia, Princess, Spanish, Habsburg family, straight coiffure, high enclosing neckline, jeweled feathered hat, neck ruff, lace, hanging sleeves, tabbed sleeves, false sleeves, carcanet necklace, pendant, necklace, jeweled bodice, jeweled sleeves