Knights Templar, Hospitallers and the other powerful Knight Orders of the Medieval World.

Because medieval London, the London of knights and sieges and plague and enormous political drama, is not gone. It is not buried under glass offices and coffee shops, lost entirely to the Great Fire of 1666 and the Blitz and two thousand years of continuous rebuilding. It is hiding in plain sight. In churches, in ruins, in underground rooms, in a meadow beside the Thames, in two giant wooden statues paraded through the City every November.

A quick overview explaining the Crusades - what they were, why they happened and what did they achieve?