As he wished, Archimedes' tombstone is marked with the figure of a sphere enclosed by a cylinder and the 2:3 ratio of their volumes. Archimedes Timeline c. 287 B.C.

Archimedes' tombstone was engraved with the image of a sphere within a cylinder, illustrating one of his geometrical treatises. The Archimedes principle: The buoyant (upward) ...

Dating from the 10th century A.D., the Archimedes text survives as writing on parchment that 2 centuries later was cut apart, roughly scraped, and overwritten with a description of a church ritual.