George van der Mijn – Portrait of Cornelis Ploos van Amstel (1726-1798) Mauritshuis

The picture has something of this: people, lid, wear, portrait, veil, woman, sash, man, cape, outfit, outerwear, coat, bonnet, costume.
Perhaps it’s a painting of a man in a green coat and hat sitting in a chair holding a piece of paper in one hand and a book in the other hand.