Portrait of Tsarevich Alexei Petrovich Hermitage ~ Part 05

The picture has something of this: portrait, people, wear, outerwear, jacket, jewelry, woman, music, necklace, musician, model, outfit, man, facial expression, pants, coat.
Perhaps it’s a close up of a painting of a man wearing a red coat and a white shirt with a black collar and a red jacket with gold buttons.