Another week, another block :)
Block no. 4 is Roman Cross by Brigitte Heitland of Zen Chic. Snag those instructions over on Brigitte's blog. I used prints from Garden Variety/Nest for my version.
To learn more about Moda Blockheads, check out my original post here. It has links to Basic Instructions and all the released blocks (at the very bottom of the post).