caption: The image shows a self-portrait of a man with a long beard, painted by Rembrandt van Rijn. The man is wearing a white shirt and has a serious expression on his face. His eyes are focused and his lips are slightly parted, giving him a thoughtful and contemplative look. His hair is dark and his beard is full and well-groomed. The painting is done in a realistic style, with the man's facial features and clothing rendered in great detail.