Check the listing for details. Rohonci Codex - Illustrated Mysterious Manuscript Cryptography Unsolved Code USB. Listed at 19.99 USD. ROHONCI CODEX. None of the many hypotheses proposed over the last hundred years has yet been independently verified. The origin of the codex is unknown. The Rohonc Codex is an illustrated manuscript book by an unknown author, with a text in an unknown language and writing system, that surfaced in Hungary in the early 19th century.
