Paul of Aegina

https://en.wikipedia.org/wiki/Paul_of_Aegina

Paul of Aegina or Paulus Aegineta (Greek: Παῦλος Αἰγινήτης; Aegina, c. 625 – c. 690) was a 7th-century Byzantine Greek physician best known for writing the medical encyclopedia Medical Compendium in Seven Books. "He is the father of early medical books"[according to whom?]. For many years in the Byzantine Empire, this work contained the sum of all Western medical knowledge and was unrivaled in its accuracy and completeness