The medical learning of western Europe was greatly enlarged during the eleventh and twelfth centuries by the translation into Latin of numerous works by Greek, Arabic, and Jewish physicians. These became the standard text-books of the Faculties or Schools of Medicine. The Greek writers most commonly mentioned in the university lists of studies are Hippocrates (fifth century B.C.) and Galen (second century A.D.). Several of their more important works were first translated--like those of Aristotle--from Arabic versions of the original Greek. Avicenna (c. 980-1037) furnished the most important Arabic contribution. Accounts of these men and their writings may be found in any good encyclopedia. For the program of studies at Paris see D.C. Munro, "Translations and Reprints," Vol. II, Pt. III. A list of the books used at Montpellier, one of the most important medical schools, is given in Rashdall, Vol. II, Pt. I, p. 123, and Pt. II, p. 780; the list for Oxford, p. 454 f. (f) _Other University Text-books_ The foregoing sections indicate the books which furnished the intellectual basis for the rise of universities, and particularly the basis for their division into Faculties. They do not indicate by any means the whole list of books used in the universities between 1200 and 1500; nor is it possible here to give such a list. Two facts only are to be noted concerning them: First, a considerable number of books already well known in the twelfth century were used in addition to those mentioned above. Among these may be mentioned the Latin grammars of Donatus (_fl._ 350 A.D.) and Priscian (_fl._ 500 A.D.), treatises by Boethius (_c._ 475-525) on Rhetoric, Logic, Arithmetic, and Music, and his translations of various portions of the _Organon_ of Aristotle, and of the _Iagoge_, or Introduction to the Categories of Aristotle, by Porphyry (_c._ 233-306). The Geometry of Euclid (_fl._ 300 B.C.) was translated about 1120 by Adelard of Bath, and the Astronomy (Almagest) of Ptolemy (second century A.D.) was pharaphrased from the Arabic by Gerard of Cremona toward the close of the twelfth century, under the title _Theorica Planetarum_.