I cannot tell you how many times I have been asked whether the Vatican has the menorah from the Beis Hamikdash [the Temple]. (The answer is no.) But I am never asked about the more then 600 Hebrew manuscripts they do have, which have been available to the scholarly community for years.Follow the link for a pdf reprint of the Ami Magazine article.
For more on the Jewish treasures that the Vatican has and doesn't have, see here and here and links.
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