The Black Death

Guy de Chauliac (c. 1300–1368)

Guy de Chauliac was a French physician and surgeon who served as personal physician to four popes in Avignon and who left one of the most detailed and clinically accurate medical accounts of the Black Death. His Chirurgia Magna (Great Surgery), completed in 1363, was one of the most important medical texts of the medieval period and remained a standard reference for centuries.

Life and Career

Guy de Chauliac was born around 1300 in the Auvergne region of France. He studied medicine at the University of Toulouse and the University of Montpellier, one of the leading medical schools in Europe. He served as personal physician to Popes Clement VI, Innocent VI, and Urban V in Avignon, and he remained in the city throughout the Black Death of 1348, treating plague patients at considerable personal risk.

The Account of the Plague

De Chauliac’s account of the plague, included in his Chirurgia Magna, is notable for its clinical precision. He described the epidemic in Avignon in two phases:

“The first was during two months with continuous fever and spitting of blood, and the sick died within three days. The second was during the rest of the time, also with continuous fever, and with apostemes [buboes] and carbuncles in the armpits and groin, and the sick died within five days.”

This description corresponds to the modern distinction between pneumonic plague (the first phase) and bubonic plague (the second phase). De Chauliac’s clinical observation was remarkably accurate, even though his understanding of the disease’s cause was based on miasma theory and astrological conjunctions.

Medical Contributions

De Chauliac’s Chirurgia Magna was a comprehensive treatise on surgery that drew on the works of Galen, Avicenna, and other authorities, as well as on his own clinical experience. The work covered a wide range of surgical topics — wounds, fractures, tumours, hernias, and eye diseases — and it included detailed descriptions of surgical instruments and techniques.

De Chauliac was one of the first physicians to recognise the contagiousness of plague, noting that the disease spread from person to person and from place to place. This observation, while not unique to de Chauliac, was significant because it challenged the prevailing miasma theory and anticipated the later understanding of infectious disease.

Legacy

De Chauliac’s Chirurgia Magna was widely circulated in manuscript and was one of the first medical texts to be printed. It remained a standard reference for surgeons well into the seventeenth century. His account of the plague is one of the most important primary sources for the medical history of the Black Death.