caption: The image shows Rembrandt van Rijn's drawing of an old man sitting on a rock, with his hands clasped together in prayer. He is wearing a long robe and has a halo of light around his head, indicating that he is a saint. His expression is one of deep contemplation, and his gaze is directed towards the viewer, as if he is deep in thought. The drawing is done in a realistic style, with careful attention to detail on his clothing and facial features.