Condemnations of 1210–1277

The Condemnations at the medieval University of Paris were enacted to restrict certain teachings as being heretical. These included a number of medieval theological teachings, but most importantly the physical treatises of Aristotle. The investigations of these teachings were conducted by the Bishops of Paris. The Condemnations of 1277 are traditionally linked to an investigation requested by Pope John XXI, although whether he actually supported drawing up a list of condemnations is unclear.

Approximately sixteen lists of censured theses were issued by the University of Paris during the 13th and 14th centuries. Most of these lists of propositions were put together into systematic collections of prohibited articles. Of these, the Condemnations of 1277 are considered particularly important by those historians who consider that they had a side effect of encouraging scholars to question the tenets of Aristotelian science. From this perspective, some revisionist historians maintain that the condemnations had positive effects on the development of science, perhaps even representing the beginnings of modern science.

The Condemnation of 1210 was issued by the provincial synod of Sens, which included the Bishop of Paris as a member (at the time Peter of Nemours). The writings of a number of medieval scholars were condemned, apparently for pantheism, and it was further stated that: "Neither the books of Aristotle on natural philosophy or their commentaries are to be read at Paris in public or secret, and this we forbid under penalty of excommunication." However, this had only local force, and its application was further restricted to the Arts faculty at the University of Paris.Theologians were therefore left free to read the prohibited works, the titles of which were not even specified.Alexander of Aphrodisias was probably among the Aristotelian commentators whose influence was targeted.

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