Froment, Nicolas (French, active 1461-1483) 2 French artists

The picture has something of this: people, portrait, veil, lid, wear, man, leader, elderly, facial hair, cap, side view, outfit, royalty, outerwear, facial expression, mustache.
Perhaps it’s a close up of a painting of a man wearing a black hat and a black coat with a black fur collar and a gold chain around his neck.