Voynich Manuscript — 600-Year-Old Illustrated Book Has Never Been Decoded

The Voynich Manuscript is a handwritten, illustrated book of 240 vellum pages composed in an unknown script and language that has resisted every attempt at decipherment for over a century. Carbon dating places the parchment between approximately 1404 and 1438. The manuscript is named after rare book dealer Wilfrid Voynich, who acquired it in 1912. The manuscript contains six distinct sections: botanical illustrations of plants, none of which are definitively identified and some of which appear to not exist in nature; astronomical charts featuring circular diagrams of stars and constellations; a biological section showing naked female figures bathing in intricate plumbing systems; a cosmological section of circular designs; a pharmaceutical section with more plant illustrations and small containers; and a text-only section believed to be recipes or recipes. The script consists of approximately 25-30 glyphs and shows statistical properties of a natural language — it is not random, there is word frequency distribution consistent with known languages, and it shows syntactic structure. It cannot, however, be decoded by any method applied to any known language. Multiple professional cryptographers, linguists, and AI systems have all failed to crack it. Theories about the manuscript range from it being a genuine text in an unknown or invented language, a complex cipher of a known language, a constructed language, or an elaborate hoax. The Beinecke Rare Book Library at Yale University has owned the manuscript since 1969 and it remains one of history's most captivating unsolved puzzles.