DAVID JACQUES LOUIS – Charles Pierre Pecoul, contractor of royal buildings, artist’s father-in-law Louvre (Paris)

The picture has something of this: people, portrait, man, jacket, wear, leader, outerwear, necklace, musician, elderly, lid, facial expression, outfit, writer, music, retro, facial hair.
Perhaps it’s a painting of a man sitting in a chair with his hand on his knee and his right hand on the leg of another man’s leg.