Aulus Cornelius Celsus

Little is known for certain about this early Roman writer’s life, and even details like whether he practiced medicine himself are still debated. He is generally placed in the early 1st century CE and is remembered as an encyclopedist whose large body of work covered several subjects, though only part of it survives.

That surviving work, De Medicina, is what made him famous. It describes Roman knowledge of health, disease, diet, pharmacy, and surgery with unusual clarity, and it preserves important ideas from earlier Greek medical traditions as well.

Because so much ancient medical writing was lost, De Medicina became especially valuable to later readers during the Renaissance and beyond. It is still read today not just for medical history, but also for the calm, practical way it records how people in the ancient world understood the body and treated illness.