Why Has the Voynich Manuscript Never Been Deciphered? The Mystery of the Unreadable Book

Documentary cover showing an actual scanned folio of the Voynich manuscript beside the words The Book No One Can Read

Why is the Voynich Manuscript still unreadable? Explore its unknown script, missing language clues, and new research on the book's page order.

Manuscript image: Beinecke MS 408, folio 1r, Yale University Library. Public-domain scan via Wikimedia Commons; editorial layout added.

A strange book preserved at Yale University contains flowing lines of unfamiliar symbols beside plants, stars, and human figures. The writing has no generally accepted translation because researchers have neither identified its underlying language nor established how its script represents information. Even after centuries of attempted solutions, the most basic question remains open: is this a language, a cipher, an unusual notation system, or something else?

The object is real, and scholars can examine its pages in high-resolution scans. That distinction matters. The mystery is not whether the book exists, but how to move from visible patterns to a reading that independent researchers can reproduce.

What Do We Actually Know About the Voynich Manuscript?

The volume is cataloged as Beinecke MS 408 in Yale's Beinecke Rare Book & Manuscript Library. Radiocarbon analysis places the manufacture of its parchment in the early fifteenth century, commonly reported as roughly 1404–1438. This dates the animal skin used for writing, not the exact moment every line was inscribed. Yale's material analysis also found inks and pigments consistent with historical manuscript materials. These are stronger clues to its age than attempts to identify its author from an illustration.

The library describes six recognizable visual groupings: plant pictures; astronomical and astrological circles; bathing figures and connected pools; cosmological diagrams; pharmaceutical-looking herbs, roots, and containers; and extended passages marked with star-like forms. The pictures suggest subjects, but they cannot reliably tell us what the words say. An unusual plant drawing is not automatically an identifiable species, and a circular illustration is not necessarily a precise astronomical chart.

Parts of its later history can be traced through surviving documents. A seventeenth-century letter sent by Johannes Marcus Marci to the scholar Athanasius Kircher shows that the book's script was already causing trouble long before modern cryptography. The manuscript later entered the rare-book trade through Wilfrid Voynich, who acquired it in 1912; it reached Yale in 1969. Earlier claims associating the manuscript with Roger Bacon or John Dee remain disputed, and the parchment dating undermines the idea that Bacon himself produced this surviving volume.

Original Voynich manuscript folio 68r opened as a three-panel astronomical foldout with blue radial diagrams and unreadable inscriptions

Actual manuscript foldout, folio 68r, Beinecke MS 408, Yale University Library. Public-domain scan via Wikimedia Commons; resized with a dark border, not reconstructed.

Its remarkable foldouts also remind us that this is a physical book, not just a string of characters. Missing leaves, changing page arrangements, and different types of illustration complicate any effort to reconstruct the order in which the material was originally used.

Why Is the Script So Difficult to Decipher?

Decipherment usually begins with a foothold: a known language, related writing systems, a recognizable name, or parallel text in two languages. The Voynich Manuscript offers no securely identified equivalent of a Rosetta Stone. Its alphabet-like signs resemble writing, but researchers disagree about how many distinct symbols exist, which marks belong together, and what counts as a word. A transcription helps computers count recurring shapes; it does not automatically reveal what those shapes mean.

That is the first obstacle: an unknown script cannot simply be substituted letter for letter into English or Latin. A medieval scribe could have used abbreviations, a cipher, specialized shorthand, or conventions that no longer survive elsewhere. The second obstacle is that the underlying language is unidentified. Even a plausible substitution table would need to produce coherent grammar and vocabulary across many pages rather than a few conveniently selected examples.

There are nonetheless measurable regularities. In a 2013 PLOS ONE study, Marcelo Montemurro and Damián Zanette found that the distribution and clustering of recurring word forms resemble some patterns found in human language. A 2021 review by Yale linguists Claire Bowern and Luke Lindemann argued that linguistic analysis can reveal structure without deciphering content. Such results make a meaningful system a serious possibility, but statistical resemblance is not proof of a particular language or translation.

Competing explanations remain alive because each answers different parts of the puzzle. A cipher hypothesis must explain unusual spelling patterns and why conventional attacks fail. A natural-language hypothesis must connect the glyphs to grammar and plausible vocabulary. A meaningless-text hypothesis must explain why the apparent regularities arise. No single proposal has persuaded the field with a consistent reading of the complete document.

Original Voynich manuscript page with green bathing imagery and groups of figures, shown beside an enlarged detail of its unfamiliar handwritten glyphs

Actual Voynich manuscript bathing-section page, Beinecke MS 408, Yale University Library. Public-domain scan via Wikimedia Commons; detail magnified for inspection.

The bathing imagery shows why pictures can mislead as well as help. We can describe the figures and green, pool-like forms that are visibly present, but naming a medical treatment, ritual, or secret recipe would require evidence the unreadable text does not yet provide.

Have Codebreakers or New Research Finally Solved It?

There have been decipherment claims for generations. The manuscript's historical catalog even records earlier proposals to read selected plant labels or star names. Yet reading a handful of signs is not the same as presenting a method another scholar can apply consistently to unfamiliar passages. A credible breakthrough should explain the script, identify the language or encoding procedure, translate extended sections coherently, and withstand independent testing.

Modern computing can compare glyph frequencies, locate repeated patterns, and suggest relationships between sections. It cannot supply an otherwise missing translation key by itself. Artificial intelligence faces the same basic evidence problem: a fluent-looking interpretation is not evidence that it matches a fifteenth-century author's intended meaning. Without a verified reference or predictions that hold beyond the examples used to construct a theory, a proposed decoding remains speculative.

Material scholarship has changed the questions researchers ask. Paleographer Lisa Fagin Davis has identified evidence for several distinct scribal hands, challenging the romantic picture of one solitary author filling every page. In a 2026 study with Colin Layfield, researchers also proposed that some folded sheets may originally have been separate units and were later bound in a different order. Their analysis compares textual patterns and physical structure. It is a hypothesis about the arrangement of the book, not a translation, and the proposed reconstruction still requires scrutiny.

If its pages were rearranged, some puzzling transitions between sections might reflect later binding rather than an incomprehensible original plan. But even a perfect reconstruction of page order would leave the unfamiliar signs unexplained. The discovery of a trustworthy parallel manuscript, a convincing key, or a repeatable reading of long passages would be much more decisive than a dramatic headline claiming that the mystery has ended.

Conclusion

The Voynich Manuscript remains unreadable because its script, language, and organizing conventions are all uncertain, and no published solution has earned broad scholarly acceptance. Real parchment, documented owners, recognizable drawings, and sophisticated computer studies have narrowed the questions without resolving the message. Its greatest lesson may be methodological: the path from a pattern to historical meaning requires evidence that survives independent verification.

Sources & Further Reading