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In page Bonaventure:

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He entered the Franciscan Order in 1243 and studied at the University of Paris, possibly under Alexander of Hales, and certainly under Alexander's successor, John of Rochelle.[3] In 1253 he held the Franciscan chair at Paris. A dispute between seculars and mendicants delayed his reception as Master until 1257, where his degree was taken in company with Thomas Aquinas.[4] Three years earlier his fame had earned him the position of lecturer on The Four Books of Sentences—a book of theology written by Peter Lombard in the twelfth century—and in 1255 he received the degree of master, the medieval equivalent of doctor.[3]