The Modern Forgery Hypothesis

[proto57]

You must also explain the required resources needed for this forgery and the strange counter motive choices made. He would need a master callirapher, but then choose an artist with Picasso levels of creativity and instruct them to illustrate like a gradeshcooler.

I do not think that the Modern Forgery theory is likely, for various reasons.  However, skillfully forged medieval manuscripts are a thing.  

These are some examples, cited by Google:

  Famous Modern Forgeries

• The Spanish Forger (active c. 1900): One of the most successful forgers in history, this anonymous artist created over 200 "medieval" miniatures. He typically painted on genuine 15th or 16th-century parchment from which he had scraped original text. His works were eventually unmasked using neutron activation analysis and Raman microscopy, which revealed modern synthetic pigments like Paris Green and chrome yellow.
  
• The Vinland Map: Acquired by Yale in the 1960s as a 15th-century map depicting Viking settlements in North America, it was definitively proven in 2021 to be a 20th-century forgery. Scientific analysis identified that the map was drawn with inks containing titanium, which only became available in the 1920s.
  
• Constantine Simonides (1820–1867): A prolific Greek calligrapher who forged numerous "ancient" documents, including Greek papyrus rolls and Byzantine imperial decrees. [...]
  
• The Czech Manuscripts: The "Queen's Court" and "Green Mountain" manuscripts, "discovered" in 1817 and 1818, were forgeries intended to bolster Czech national mythology. They were accepted as authentic for nearly 70 years before being debunked.
  

All the best, --stolfi

Those are good examples, Jorge, I think. And there are a great many lesser known examples of forgeries meant to reflect all eras, all materials, in art, literature, history, which are and have been quite impressive. As I recommended above, one can read more about the history of forgery, and hundreds of fascinating examples in my "Forgery Bibliography":  You are not allowed to view links. Register or Login to view.

As for The Spanish Forger, it is interesting and telling to me that many of "his" or "their" forgeries, while known to BE fakes, are still not identified as such! for instance the "Columbus Miniature" at the British Library: You are not allowed to view links. Register or Login to view. Until well after it was disclosed as being a forgery, they still described it as genuine.

   

Top, forged map on the back of the "Columbus Miniature", by the Spanish Forger or other; Bottom, the forged Vinland Map.

Since the Morgan put out their book on the Spanish Forger (in the 1970's), the true forger of that miniature was shifted to an "unknown forger". And I just checked and see that the British Library seems to have taken down the page on it... maybe this is (finally) why? Point being, many forgeries still sit in institutional repositories, totally "busted", yet the institutions are highly reluctant to admit it. Such of course was the Vinland Map, which you reference... that dog was defended for decades, ad nauseum, until Yale FINALLY accepted the sorry truth of it (by the way, the "authenticity" of the Vinland Map has been used, in this very forum, as an argument against my own ideas, i.e. (paraphrasing), "The Vinland Map was suspected, but obviously genuine, and the same is the case for the Voynich". Likewise, Benedek Lange, author of a popular book on the Rohenc, told me to my face (before we went on in the same set at the NSA Conference) that (paraphrasing again), "The Rohenc has been suspected, like the Voynich, but it is genuine, so suspected items can be real". Well I strongly disagree with Benedek, and agree with many who argue that is a fake, too. And so on...

TLDR: Yes, I agree that there are a great many very good forgeries, created in all medium, in all times, for all purposes.

All the best, Rich