In 1259, Peter took part, perhaps because of his status as a Master at Paris, perhaps as an elected "Definitor" (delegate) for the Province of France, in the General Chapter of the Dominican Order at Valenciennes, under the leadership of the Master General, Humbertus de Romans. Peter participated together with Albert the Great, Thomas Aquinas, Bonushomo Britto, and Florentius. This General Chapter established a "ratio studiorum", or program of studies, which was to be implemented for the entire Dominican Order, that featured the study of philosophy as a preparative for those not sufficiently trained to study theology. This innovation initiated the tradition of Dominican scholastic philosophy which was to be put into practice in every Dominican convent, if possible, for example, in 1265 at the Order's "studium provinciale" at the convent of Santa Sabina in Rome. Each convent was expected to have an elected "Lector" to supervise the preparative studies and an elected Master for theological studies. In the next year he was assigned the title of Preacher General.