The Rohonc Codex is a illustrated, handwritten manuscript in some ways similar to the The Voynich Manuscript and other mysterious, encoded texts from the European Middle Ages. Not a single word has been decoded from the Rohonc Codex, though many have tried. Year-long studies have been made and experts in encryption have worked on the case. What is especially intriguing is that many of the failed attempts to solve the puzzle concludes that the scripts regularities strongly suggest a meaning.
The Rohonc Codex is kept at Hungarian Academy of Sciences, this PDF is a complete copy generated from a microfilm. The author, origin and date of the work remains a mystery. Download the Rohonc Codex here (9.75 MB / 448 pages):