Did you know for instance, that the Most Mysterious Manuscript is the Voynich Manuscript. In 1912, during a trip to Rome, Wilfrid M. Voynich visited the villa Mondragone in Frascati and found it in a collection of ancient manuscripts. Wilfrid Voynich judged it to date from the late 13th century, on the evidence of the calligraphy, the drawings, the vellum, and the pigments. It is some 200 pages long, written in an unknown script of which there is no known other instance in the world. It is abundantly illustrated with awkward colored drawings.
Experts believe it is European based on the drawings.
They believe it was written in between the 15th and 17th centuries. The manuscript is small, seven by ten inches, but thick, nearly 235 pages. It is written in a language of which no other example is known to exist. It is an alphabetic script, but of an alphabet variously reckoned to have from nineteen to twenty-eight letters, none of which bear any relationship to any English or European letter system. The text has no apparent corrections.