The story of how it was invented is not what you might imagine. From the Edystone Lighthouse, via the London sewers and through to the political importance of the British Empire to dominate the world. This lecture tells the story of a small group of men in England and France who would stop at nothing to outdo each other. What they achieved is remarkable. This truly fascinating lecture takes you back to a time before cement existed and then charts its development and how it literally changed the world.