The Gutenberg Press was perhaps the most revolutionary machine ever invented. Stephen Fry discovers the lengths to which Gutenberg went to keep his project secret then helps to build a working model of the press and explores how print democratised knowledge by making the written word accessible to all. Stephen Fry investigates the story of one of the most important machines ever invented – the Gutenberg Press. The printing press was the world’s first mass – production machine. Its invention in the 1450s changed the world. It is the machine that made us who we are today. Stephen’s investigation combines historical detective work and a hands – on challenge.