The Voynich Manuscript
Discovered in Rome in 1912 by a Polish-American book dealer, the Voynich manuscript is a 15th century illustrated codex that was handwritten in an unknown writing system. The manuscript has some missing pages with 240 still remaining intact and it contains a large number of strange illustrations. The manuscript has been studied by professional and amateur cryptographers alike including both American and British codebreakers from WWI and WWII. The text is written from left to right and most of the characters are composed of up to two simple pen strokes. The illustrations in the manuscript are what intrigues people the most since they contain diagrams, plants, and creatures never seen before.
People speculate that the manuscript’s purpose is to address medieval medicine or to serve as pharmacopeia which is a type of book for identifying compound medicines. There are several theories as to how the manuscript came to be with the leading one stating that it contains a meaningful text written in some European language rendered obscure using some unknown cipher. To this day nobody has even come close to deciphering it.