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Ages, paternity of the treatise was variously attributed to Theophrastus (d. 286 B.C.); Avicenna (d. 1037); Algazel (d. 1111); and to Aristotle (d. 322 B.C.); with or without commentary by Alfarabi (d. 950). By the early 1230s, Aristotle's candidature held ascendancy over all others. Thus, when the University of Paris lifted the proscriptions against the libri naturales Original: "natural books" (referring to Aristotle's works on nature) of the Stagirite term: The Stagirite refers to Aristotle, who was born in Stagira. in 1255, the Liber de causis was officially enrolled into the syllabus of the Faculty of Arts as a canonical work