In 1912, the antiquarian book dealer Wilfrid M. Voynich bought a number of medieval manuscripts from an undisclosed location in Europe. Among these was an illustrated manuscript codex of 234 pages, written in an unknown script.
Voynich took the manuscript to the United States and started a campaign to have it deciphered. Now, almost 100 years later, the Voynich manuscript still stands as probably the most elusive puzzle in the world of cryptography. Not a single word of this 'Most Mysterious Manuscript', written probably in the second half of the 15th Century, can be understood.