NOVA: Secrets of Lost Empires 2: Medieval Siege

Have you ever marveled at the mystery of Stonehenge and the Pyramids? Experts have had the very same musings. A team of engineers, architects and archaeologists set out to replicate these symbols of civilizations past using just the resources available at the time they were originally built. Spellbinding stories and photos reveal a group of modern-day craftsmen struggling with the same problems that their ancestors faced thousands of years ago