To protect his rich and strategic lands in France, the English king, Richard the Lionheart, decided to build an impregnable castle to bar the route along the Seine, thus asserting his supremacy in Normandy. Looking at the finished structure, King Richard used the French word "Gaillard" to describe the castle's strength. With its monumental dimensions, the building acquired the name which would send a shiver down the spine of more than one enemy. This modern documentaries takes the viewer through a computer animated reconstruction of the castle and it's structured, many-layered defenses, to explain how they were one-by-one overcome by France's King Philip, besieged the site at the head of an army of 6,000 men, despite its incredible defenses. But how would they manage to topple the impregnable fortress? A computer restructuring or the battles explains this great architectural adventure alongside this gripping account of war led by historians. The Daunting Fortress of Richard the Lionheart is the story of an amazing feat of medieval military construction.