This is such an amazing scene. You can really feel the sense of scale that this building has. It's too bad that this windmill would never work - if wind blew across this thing, which direction would it turn? It wouldn't turn! You should have made the blades into V-shaped scoops instead of having them be flat. That's just a small quibble with an otherwise awesome image.
Wow, I absolutely love the colour in this, really awesome design too! The roof is killer, you can tell you've thought about how it would work if you walked into and around this place. Although im not sure a dirt road would be suitable for people who are advanced enough to build something like this?