Building your very own Castle

So; you want to build a castle, eh? - A Castle Design Blog

CASTLEMAGIC Castle builders - Bonafide Castle Builders, lots of tips, pictures and they have quite reasonable prices too.

Castle Book List - A nice list of books to get you started

Alternative House-Building Resources - Stone Masonry, Straw, Log, Rammed Earth, Adobe, Earthships, Papercrete, etc.

Thoughts on Building a Castle - Geared toward making a castle to live in

Medieval Castle Builders - A study of the medieval castle building techniques and how to apply them to building your own castle

Belarusian castles and fortification elements - the history of Belarusian Castles and Fortification Science through the ages

Traditional Masonry Magazine - Great resource for modern stonework practices

Digital Design Tools - ArchitectureWeek Online Library - A listing of architectural design topics

Building A Stone Castle - An overview of the process and the different roles involved

Spiral stair plans - Because every castle needs a spiral staircase. This site lays out the necessary math.

Google SketchUp - A free 3d program that works pretty well. At least enough for you to get some idea of the construction.