A giant slab of glass is discovered in the middle of an ancient cemetery where important Rabbis are buried. What’s it doing there? Simcha has a theory that it was an unsuccessful attempt at making a window for Herod’s temple renovation in the late 1st century BCE – and therefore Holy. That’s why Rabbis would want to be buried near it. But as he tries to figure out if his theory is correct, he follows the glass trail and discovers that glass may have been invented in Israel – not Egypt, as is commonly believed.