A Distant Mirror: The Calamitous 14th Century

by Barbara W. Tuchman

Doctors struggling with the evidence could not break away from the terms of astrology, to which they believed all human physiology was subject. Medicine was the one aspect of medieval life, perhaps because of its links with the Arabs, not shaped by Christian doctrine. Clerics detested astrology, but could not dislodge its influence. Guy de Chauliac, physician to three popes in succession, practiced in obedience to the zodiac. While his Cirurgia was the major treatise on surgery of its time, while he understood the use of anesthesia made from the juice of opium, mandrake, or hemlock, he nevertheless prescribed bleeding and purgatives by the planets and divided chronic from acute diseases on the basis of one being under the rule of the sun and the other of the moon. In October 1348 Philip VI asked the medical faculty of the University of Paris for a report on the affliction that seemed to threaten human survival. With careful thesis, antithesis, and proofs, the doctors ascribed it to a triple conjunction of Saturn, Jupiter, and Mars in the 40th degree of Aquarius said to have occurred on March 20, 1345. They acknowledged, however, effects “whose cause is hidden from even the most highly trained intellects.” The verdict of the masters of Paris became the official version. Borrowed, copied by scribes, carried abroad, translated from Latin into various vernaculars, it was everywhere accepted, even by the Arab physicians of Cordova and Granada, as the scientific if not the popul...