The Archimedes Palimpsest is a medieval parchment manuscript that was scraped and overwritten but originally contained several previously unknown works by Archimedes.
Notes on verification
Multiple independent, authoritative sources (Archimedes Palimpsest Project, American Scientist, PBS/NOVA) corroborate all elements of the claim: the manuscript's medieval origin, the scraping/overwriting process, and the recovery of previously unknown Archimedes works like The Method of Mechanical Theorems.
Sources
- List of mathematics history topics (en.wikipedia.org)
- https://www.archimedespalimpsest.org/about/ (archimedespalimpsest.org)
- https://www.americanscientist.org/article/archimedes-unbound (americanscientist.org)
- https://www.pbs.org/wgbh/nova/physics/inside-archimedes-palimpsest.html (pbs.org)