This is a large castle, and is a nice, very late-game house. The grey represents what material you want to make it out of and (not including floors) is approx. 40 stacks of material for an 10 block high, one floor castle.
Omg I remember making this long time ago.exactly like this but a THOUSAND times better! I put iron bars and a deep water trench in the middle with some columns. I also added some skeletons inside to be like bodyguards or something.