(masterpiece), (Rembrandt style:1.3), iconic portrait of a pretty mature woman, realistic, highly detailed, mysterious expression, black hair, wearing a red summer cotton dress. (Baroque style), chiaroscuro lighting, subtle shadows, soft textures, classic oil painting style, flat lighting, old master techniques, elegant posture, warm and rich color palette, enigmatic and introspective mood, traditional portrait composition, 8k, photorealistic, fine art.