Portrait gr. K. A. Pozzo di Borgo. 1833-1835 Karl Pavlovich Bryullov (1799-1852)

The picture has something of this: people, portrait, wear, man, veil, leader, jewelry, outfit, necklace, royalty, jacket, outerwear, music, facial expression, lid.
Perhaps it’s a close up of a painting of a man in a military uniform with a medal on his left shoulder.