Hi Laura, >>I’d like to fold the polyhedron that appears in Melencolia I, the famous >>engraving by Albrecht Durer. >>What would be the best match and where can I find the diagrams? It looks like a cube truncated at opposite corners (and slightly squished!) I'm not aware of any diagrams that would match it exactly. But in the spirit of throwing open a challenge, would you be looking for edge units or flat face units? Edge units you'd 6 each of three different sizes. For flat face units you'd need 6 of one and 2 of another, but I suspect that it could be done with 6 identical units with a clever lock to make the other two faces (which would have creases). I'll ponder it, but I hope that some other geometric or modular folders out there will give it a shot!