Galen might have sworn an oath to this 5th century B.C. Greek man he considered the beginning of all medical learning
The Hippocratic texts deal with all manner of medical topics but can be 
grouped ... With the Oath the practitioner swore by Apollo, Hygieia and... [DOC] [TLE] The Hippocratic Oath - Utilis.net [PAR] Hippocrates of Cos lived between 469-399 B.C.