_1311._ The writings of Segarelli were formally condemned by the _Council of Vienna_, a condemnation which was a year or two later confirmed by John XXII. In 1471, that is, more than a century and a half later, these same writings were formally approved by Sixtus IV, the condemnation having been recalled.[25] This appears to be the first instance on record in which a work condemned by one pope has later received the approval of another. _1316._ _The Inquisition in Tarragona_ condemns fourteen treatises of the physician Arnold of Villanova (who had died in 1310), and orders copies to be delivered under penalty of excommunication. _1321._ _John XXII_ condemns twenty-eight propositions selected from the writings of the Dominican Eckart. Seventeen are classed as heretical and eleven as suspicious and dangerous. _1325._ _John XXII_ issues a Bull against conjuring and exorcism, and orders the delivery for destruction of all writings which contained any teachings on these pernicious subjects. _1327._ _John XXII_ issues a Bull condemning as heretics Marsilius of Padua and John of Jaudun, and as heresy the book _Defensor Pacis_ of which they were joint authors and which he had had examined by cardinals and canonists. _1328._ _The Inquisition of Rome_ condemns as a heretic Cecco d’ Ascoli, who is burned together with his offending treatise, _de Sphaera_. _1328._ _John XXII_ condemns and orders destroyed the writings of the Minorite Petrus Johannes Oliva, which had been examined and reported upon by nine theologians. The bones of Oliva were disinterred and were burned with copies of his books.[26] _In 1471_, _Sixtus IV_ (who was himself a Minorite) orders the writings of Oliva to be again examined and declares them to be sound in their doctrine. _1328._ _John XXII_ condemns in like manner the Minorite General Michael of Cesena, William of Occam, and Bonagratia of Bergamo, and all their writings. _1330._ _The Theological Faculty of Heidelberg_ condemns the teachings of Eckart. _1348._ _Pope Clement VI_ condemns a series of the theological propositions of the Paris theologian, Nicholas de Ultricuria (de Autrecourt). Nicholas was ordered to abjure these heresies and to burn all copies of the writings.[27] _1374._ _Pope Gregory XI_, as a result of an examination made by certain cardinals and theologians, condemns as false, schismatic, and heretical, and as _contra bonos mores_, fourteen articles of the _Sachsenspiegel_. The Bull was directed to the Archbishops of Mayence, Cologne, Bremen, Magdeburg, Prague, and Riga. The _Sachsenspiegel_ was, however, never placed on the Index.