Create a realistic medieval stone c...

Create a realistic medieval stone castle suitable for a feudal lord around 1200 CE in Northern France. The castle should be built on a hill and include thick stone walls, corner towers, battlements, and a central keep. Include a main gate with a simple entrance, a courtyard, and minimal decoration. The design should be functional and defensive, not overly large or fantasy-like. Use stone, cobblestone, and wood, and keep the style historically accurate and slightly worn.