Background
Source: Wikipedia
Aulus Cornelius Celsus (c. 25 BC – c. 50 AD) was a Roman encyclopedist, known for his extant medical work, De Medicina (On Medicine), which is believed to be the only surviving section of a much larger encyclopedia. The De Medicina is a primary source on diet, pharmacy, surgery and related fields, and it is one of the best sources concerning medical knowledge in the Roman world.
