Portrait of an unknown person in a purple robe Ermolai Kamezhenkov (1760−1819)

The picture has something of this: people, portrait, jacket, man, necklace, outerwear, wear, music, facial hair, musician, pants, writer, blazer, singer, brunette, goatee, facial expression, knitwear.
Perhaps it’s a close up of a painting of a man wearing a black jacket and a white shirt with a flower on it’s collar and a black background.