Portrait of a Man, possibly Don John of Austria (1547-78) Francois Clouet (1510-1572)

The picture has something of this: people, portrait, man, wear, lid, facial hair, veil, leader, mustache, outerwear, cap, face, side view, profile, military.
Perhaps it’s a close up of a painting of a man with a beard wearing a white uniform and a black hat with a beaded necklace around his neck.