This was painted in the 1600s, making this a posthumous portrait.
Upgrade image posted 3 October 2017 from altesses.eu/princes_max.php?image=390fe3dd25.
An aging Catherine de Medici is shown wearing a simpler version of the dress seen in the first two images (here and here).
Keywords: Catherine de Medici, Medici family, Valois family, French, Queen, curly coiffure, French hood, earrings, shallow necklace, jeweled fitted bodice, jeweled crescent neckline, slashed rolled sleeves, jeweled long close sleeves, back-flared cuffs, girdle, vee waistline, farthingale, jeweled over-skirt, jeweled under-skirt, gloves