Alright @Staxed and @Padfoote, I've begun Orthanc.
http://i.imgur.com/dUlNE0S.png
Also, from discussion with Padfoote on IRC, I think I may be releasing this pack on a launcher once I get everything set up, which will be once this world is "complete".
Edit: I should add that all of that stone took FOREVER to get. This is probably gonna be a big project.
Do you know how tall it's going to be, and how large the footprint is? Curious to see the size compared to the one I have planned