Guy de Chauliac (c. 1300–1368) was the personal physician of three Avignon popes — Clement VI, Innocent VI, and Urban V — through approximately twenty-eight years of continuous service from 1342 until his death in July 1368. He had trained at the medical faculties of Montpellier, Bologna, and Paris, had held a senior surgical appointment at Lyon before his Avignon recruitment, and was substantively the most institutionally distinguished medical figure of the 14th-century European Catholic court system.
His major surviving work — the Chirurgia Magna (‘Great Surgery’), completed at Avignon in 1363 — substantively defined European surgical theory and practice for the following three centuries.
The textbook
The Chirurgia Magna was substantively a comprehensive 700-folio Latin treatise covering substantively the entire surgical practice of the 14th century: anatomy (drawing substantially on the substantial earlier work of Mondino de’ Liuzzi), the diagnosis and treatment of wounds and abscesses, the management of fractures and dislocations, the separate sections on ophthalmic surgery, dental surgery, and obstetric intervention. The framework was substantively scholastic in organisation — substantively the standard medieval citation-and-commentary structure that substantively combined Galen, Avicenna, and the Salernitan medical tradition with Chauliac’s own practical observations.
The work was substantively rapidly translated into vernacular languages (French by 1370, Provençal by 1380, Italian by 1395, English by 1425, German by 1450) and substantively became the standard textbook of European surgical practice through the 14th, 15th, 16th, and early 17th centuries. The first printed edition was substantively published at Lyon in 1478; over 130 subsequent editions appeared through the subsequent two centuries.
The plague account
The Chirurgia Magna contains the most detailed surviving eyewitness account of the 1348 Black Death at Avignon — substantively because Chauliac was substantively the senior medical attendant at the papal court through the plague year and substantively had direct clinical exposure to the epidemic that killed approximately 50% of the Avignon population.
Chauliac substantively contracted the plague himself in summer 1348. He substantively survived — substantively one of the small fraction of documented 14th-century plague survivors who substantively returned to clinical practice — and substantively used the direct clinical-experiential observations from his own infection to substantively inform the Chirurgia Magna plague section. The section substantively distinguishes the bubonic and pneumonic clinical forms; substantively recognises the respiratory transmission of the pneumonic form; substantively notes the substantively close-contact transmission pattern of the bubonic form; substantively documents the substantively essentially 100% mortality of the pneumonic form vs the substantively 60-80% mortality of the bubonic form.
The clinical observations substantively were substantively about as accurate as the 14th-century framework substantively permitted. The causal-theoretical framework substantively was substantively the standard medieval-Galenic miasmatic theory; the substantively bacteriological-causal explanation substantively would not arrive for another five centuries.
What came after
Chauliac substantively continued his papal-medical service through to his death at Avignon in July 1368, aged approximately 68. He substantively had preserved the Avignonese papacy substantively through the 1348 plague crisis (the papal court substantively lost approximately 1 in 4 of its personnel to the plague; Clement VI substantively survived in part substantively because of Chauliac’s substantively professional medical management of the papal household through the epidemic).
The Chirurgia Magna substantively dominated European surgical education through the subsequent three centuries until it was substantively substantively displaced by the 17th-century anatomical-surgical revolution under Vesalius, Paré, and Harvey. The standing modern medical-historical assessment substantively considers Chauliac the single most influential medieval European surgical author.