From Wikimedia; numerous spots throughout image and a pair of reflection streaks above her head (but not two more just below the neckline) repaired with Photoshop by gogm.
This appears to be a copy of the previous Voet portrait.
Keywords: 1675, Voet, Hortense Mancini, Mancini family, de La Porte family, Duchess, mistress, Charles II, long hurluberlu coiffure, straight neckline, chemise, lace, quarter length full sleeves, slashed sleeves, brooch, clasps, earrings, wrap