The hat, headdress, ruff, and carcanet necklace worn by Isabella Clara Eugenia in her 1579 Coello portrait.
On to next (final) image of this group.
Many sleeve rolls of the era are slashed, but these aren't.
Keywords: 1579, Coello, Infanta Isabel Clara Eugenia, Princess, Spanish, Habsburg family, curly coiffure, high enclosing neckline, jeweled feathered hat, jeweled headdress, neck ruff, lace, carcanet necklace, jeweled bodice, hanging sleeves, tabbed sleeves, rolled sleeves, slashing, saya