Generate a symmetrical medieval imp...

Generate a symmetrical medieval imperial government castle suitable for a Minecraft Towny political server. The structure should be designed as the central state palace, realistic medieval European style (stone bricks, polished stone, dark stone accents), not fantasy-heavy. Layout requirements: A large circular central hall with approximately 40 block diameter (radius ~20) serving as the main entrance hall. A grand internal staircase inside the central hall leading to upper floors that contain council and discussion chambers. Two symmetrical side corridors extending from the central hall, each approximately 18 blocks long and 9 blocks wide. At the end of each corridor, include a medium-large administrative room (about 15×15 blocks). Next to each administrative room, include a round t