By this time Paris had become the centre of scholastic philosophy, which was now beginning to predominate theology. This takes its form, as yet untouched by Arabic methods, in the work of Peter Lombard (d. 1160 A.D.), whose “Sentences,” an encyclopædia of the controversies of the time but a mere compilation, remained a popular book down to the 17th century. The methods and form used in the “Sentences” shows the influence of Abelard, and still more of the Decretals of Gratian. It is interesting to note that Peter Lombard possessed and used a newly finished translation of St. John Damascene. Early in the 13th century we find various controversies at Paris on subjects very like those debated by the Arabic philosophers, but in reality derived from quite independent sources. Nothing would seem more suggestive of Arabic influence than discussion of the essential unity of souls, which seems as though it were an echo of Ibn Rushd; but this doctrine had been developed independently from neo-Platonic material in the Celtic church, and, in its main features not at all unlike the teaching of Ibn Rushd, was fairly common in Ireland (cf. Rènan: _Averroes_, 132-133). So we find Ratramnus of Corbey in the 9th century writing against one Macarius in refutation of similar views. Here Arabic influence is out of the question; at the time, indeed, Ibn Rushd was not yet born. So of Simon of Tournay, who was a teacher of theology at Paris about 1200 A.D., we read that “whilst he follows Aristotle too closely, he is by some recent writers accused of heresy” (Henry of Gand: _Lib. de script. eccles. c._ 24 in Fabrisius _Bibliotheca_, 2, p. 121), but this simply means that he carried to an extreme the application of the dialectical method to theology. More interest attaches to the decrees passed at a synod held at Paris in 1209 and endorsed by the decisions of the Papal Legate in 1215. These measures were provoked by the pantheistic teaching of David of Dinant and Amalric of Bena, who revived the semipantheistic doctrines of John Scotus’ _Periphysis_, and the prohibitions dealing with them cite passages from Scotus verbatim. The _Periphysis_ itself was condemned by Honorius III. in 1225. But the decrees of 1209 also forbade the use of Aristotle’s Natural Philosophy and the “commenta,” whilst the Legate’s orders of 1215 allowed the logical works of the old and new translations where perhaps the “new translations” refers to the “new” translations made from the Arabic as contrasted with the “old” versions of Boethius, though it is just possible that some version direct from the Greek was in circulation and known as the “new translations,” and also forbade the reading of the Metaphysics, Natural Philosophy, etc., all material which had become accessible through the Arabic.