Here is Elefsina, its archeological site, as photographed yesterday by the Pomegranate team. The puzzle is 2.300 years old and it belongs to Archimedes, the ancient mathematician, one of the three greatest ever. You can print and cut and assemble it. This is a simple way to solve the puzzle that has buffled people so much, it gave them a stomachache. That is probably why it is called "stomachion". Another explanation is that you mingle the parts, just as the stomach mingles food. Do you know the other two top mathematicians?