The article traces the changes that occurred in the teaching of theoretical medicine at the University of Paris in the seventeenth and early eighteenth centuries, as the Faculty came under the influence of new medical ideas and discoveries. As a result it is essentially a study in the history of the transmission of ideas; the article illustrates how quickly and in what form these new ideas and discoveries became part of the common medical inheritance of one region of Europe. At (...) Paris, it is shown, the Faculty of Medicine was completely under the influence of the theories of Galen and Hippocrates at the beginning of the period, and rival ideas were greeted with hostility for much of the seventeenth century. By the early eighteenth century, however, the Faculty was completely abreast of contemporary developments and no longer wedded to a particular ‘school’. This change, it is emphasised, was associated with and closely influenced by, the growth of a more humble and discerning attitude among the Faculty's doctors with regards to the limits and the objectivity of their medical knowledge. The article is largely based on a hitherto unused source: the collection of abstracts of theses sustained in the period, to be found in the present-day Bibliothèque de la Faculté de Médecine at Paris. (shrink)