Before downloading please take note this is not a castle!
But it is the walls and towers that go around your castle.

I have made this for all those budding castle makes out there who liked the crenelations and eves of the
spawn tower/fall back tower (Link)
I have added three layers of basic stone at the bottom of each ground piece so that when you place it using an editor program you will have a slightly smother look when placing it on uneven ground.
plus when using mcedit you can surround the bottom stone section then clone it remebering to un tick the clone water part so that it does not clone the air and makes it actually blend in with the terrain with out extra editing.

this set includes:
one wall type,
three wall corner types with door variants,
five stand alone tower types (of which only one is not connectable),
and two tower bridge types.

feel free to edit and modify these to your own needs :)