William Cecil, 1st Baron Burghley Hans Eworth (Ewoutsz) (1520-1574)

The picture has something of this: people, portrait, wear, man, lid, veil, woman, jewelry, royalty, cap, administration, outerwear, facial hair, leader, coat, musician.
Perhaps it’s a painting of a man with a long beard wearing a black outfit and holding a calculator in one hand and a book in the other hand.