I want a massive defensive high wal...

I want a massive defensive high walled, medieval castle/city. the main keep should be elevated and at the center of the city. i want layered walls with multiple gates, towers and battlements. the city must have a merchants quarter, dock for boats, so build it near the water, or as its own island with a bridge connected to land. outside the walls of the keep but within the walls of the city, i want a smithy, winding cobblestone streets, hidden tunnels beneath the keep and chambers, a sewage system. fully furnaished and unique houses throughout the streets. in the keep i want multiple unique bedchambers, armory, library, potion room, dungeon, throne room, a large great hall that you enter as soon as you open the gates to the keep. dining room and anything you think of a great castle would ha