A start on me castle...

20 and a half stacks of stone bricks it took to make a 15-block diameter tower, 24 blocks tall. The water I am using as a temporary elevator of sorts until ladders are put in. what you see in the middle image is the start of a walkway for the wall. The tower's top I am undecided on, so I left it as is on the lower image just so something is there until I come to a decesion. There will be a tower like this every time the wall changes direction.