Overview:Carl Cookson and Hamilton White investigate a Crusader sword and helmet that date back more than 900 years. Oxford historian Dr Janina Ramirez helps them decode the symbolism on these ancient relics to show that the sword may have been used in the First Crusade when Christian knights retook the holy city of Jerusalem, and that the helmet, embossed with the Lion of St Mark, was made in Venice. Travelling to Italy’s ‘floating city’, Carl and Hamilton learn more about how and why Venice adopted St Mark as its patron saint and went on to become a leading maritime power – eventually supplying crucial ships for the Crusades. They also discover that, on the way to Jerusalem, the Venetians chose to attack the Christian city of Constantinople to recoup losses they had sustained in building the fleet. In the archives Janina discovers a powerful and vivid first-hand account of the “Sack of Constantinople” by a government official who was living in the city at the time.