The Influence of Astrology on the Development of a Disease

The sickly Jan Galiazzo Sforza died prematurely in 1494, his doctors explained their failure to keep him alive in astrological terms. We can see from this example that astrology was closely connected to medicine. To cast the horoscope of one's patient was like taking a medical history. An observation of the stars could influence both diagnosis and prognosis. This conviction could be found at the highest echelons of society.