Here is another link I just found, quilt inspired by floor tiles from St. Andrews Cathedral in Inverness. This is a beauty!
http://www.hgtv.com/crafting/scottis...ilt/index.html
Unfortunately the directions don't include a pattern for the applique but you may be able to duplicate it on your own by downloading the photo and enlarging it.
This only makes a 40" wall hanging. You could probably enlarge it with borders or a round of blocks to enlarge it.