Unlike decumbitures (medical horary charts) which were chiefly promoted by the English astrologers of the 17th century like Nicholas Culpeper, Richard Saunders and William Lilly, Dorotheus’s iatromathematical charts concerning sickness are distinctive because of their specific mundane location of the sick and his physician in the chart, which could be constructed for the moment of the inception of the medical examination and establishment of diagnosis, the beginning of treatment, the moment when the sick meets the physician for the first time, the moment when the physician first heard