The Vatican Apostolic Library has identified more than 550 manuscripts in its own collections containing palimpsests — parchment pages where original text was scraped away and the surface reused for new writing. These erased texts span 13 languages and date from the 4th century through the 12th century. A project funded by the Andrew W. Mellon Foundation and carried out in collaboration with Stanford University Libraries is digitally recovering them. The recovered texts are being published at spotlight.vatlib.it/palimpsests.
What a Palimpsest Is and Why It Matters
In the medieval period, parchment was expensive. When a manuscript was considered obsolete — whether the text was heretical, out of date, or simply less valuable than what was needed — the surface could be scraped and the parchment reused. The original text was not always fully removed. Multispectral imaging and ultraviolet photography can now recover the erased text beneath. The Vatican’s 550 palimpsests represent the written record of ideas that someone, at some point, decided to erase — and that are now being recovered.
The Languages
The 550+ palimpsests cover 13 languages including Latin, Greek, and several Eastern and Oriental script traditions. The manuscripts range from 4th-century late Roman texts through Byzantine-era materials and early medieval Western sources. The variety of languages reflects the Vatican Library’s role as a repository not just of Latin Christendom but of manuscripts acquired through papal diplomacy, crusade, scholarly gift, and purchase across the full Mediterranean world.
The UAP Relevance
Medieval manuscripts are among the primary sources for accounts of anomalous celestial phenomena observed before modern records began. Annals, chronicles, hagiographies, and astronomical treatises regularly record objects in the sky that do not correspond to known astronomical events — described as fiery shields, spinning wheels of light, formations of lights, and objects emitting beams. The Vatican’s manuscript collections are one of the largest single repositories of such records anywhere. What is being erased in palimpsests — and what is being recovered — may include observations that were suppressed precisely because they were anomalous.
Source: digi.vatlib.it. spotlight.vatlib.it/palimpsests. Vatican Apostolic Library. Mellon Foundation / Stanford University collaboration.