palimpsest
A section of Archimedes's treatise On Floating Bodies (vertical) is barely visible beneath the 12th-century text of the prayer book (horizontal). (© Christie's Images, New York.)
International Journal of High-Energy Physics
International Journal of High-Energy Physics
A section of Archimedes's treatise On Floating Bodies (vertical) is barely visible beneath the 12th-century text of the prayer book (horizontal). (© Christie's Images, New York.)