The Voynich Manuscript

Named after the book dealer that purchased it back in 1912, the Voynich manuscript is carbon-dated to be written during the Italian Renaissance in the mid-15th century. The manuscript is written in an unknown language and writing system, with pages filled with diagrams and charts. Many codebreakers from World War I and World War II have tried their hand in cracking the manuscript but to no avail.

There are different theories surrounding the manuscript, including the theory that all of it is just a hoax. Large investments have been made to uncover this mystery, but to this day, it remains to be unsolved.