caption: The image shows a drawing of an old man with a long beard, believed to be Leonardo da Vinci, on a piece of paper. His facial features are detailed and his eyes are closed, giving him a peaceful and serene expression. His beard is full and well-groomed, and his hair is neatly combed. He is wearing a white robe with a blue sash draped over his shoulders. His hands are clasped in front of him, and he is standing in a contemplative pose.