Portrait of AA Stahovich. 1911 Valentin Serov (1865-1911)

The picture has something of this: people, portrait, man, mustache, wear, facial hair, facial expression, two, scientist, elderly, retro, jacket, eyeglasses, royalty, side view.
Perhaps it’s a painting of a man in a suit and tie holding a piece of paper in his right hand and looking at the camera with a serious look on his face.