Explore the Battle Castle structures and the masterminds behind them - men who turned stones into strongholds, mortals into legends and empires into dust. For a thousand years they dominated the landscape, towering over their surroundings, their role so critical that the capture of a single one could seal the fate of an empire. In this series, historian and popular presenter Dan Snow unravels the stories of three of the world's most famous castles, from Europe to the Middle East. Built and fought for by men like Richard the Lionheart, these are the sites of some of the most legendary power struggles of all time. All are all prime examples of their era, a testament to the engineering and military expertise of the day. The central narrative of each episode is the story of one castle at a critical moment in its history - the point at which, after decades of building and improvements, it is thought to be invincible. Now it faces the ultimate test: an attacking army determined to overthrow the defenders. Lavish CGI reveals the castle's design and meticulous construction, recreating it in all its original glory. Medieval warfare was an ongoing game of innovation and counter-innovation, with weaponry and techniques constantly being modified and adjusted. Find out what forces each 'caste