Abraham Ibn Ezra’s (ca. 1089-ca. 1161) astrological corpus includes the two versions of Sefer ha-ʿOlam (Book of the World), which represent the first Hebrew theoretical work, unique in medieval Jewish science, to discuss the theories and techniques of historical and meteorological astrology that had accumulated from Antiquity to Ibn Ezra’s time. This article surveys the content of the two versions of Sefer ha-ʿOlam and their most important doctrines as he conceived of them. The relevant material is presented chronologically: (a) the (...) ancient period; (b) the Hellenistic period; (c) Indian and Persian contributions; (d) contributions by astrologers working in the Muslim world; and (e) connections with twelfth-century Latin work on world astrology. In addition, this paper examines the contents of three additional texts by Ibn Ezra, directly concerned with word astrology: (a) the tenth chapter of Reshit Ḥokhmah (Beginning of Wisdom), where Ibn Ezra presents a series of cycles related to world astrology; (b) the astrological section of the exegetical excursus in the long commentary on Exodus 33:21, where Ibn Ezra inserts material on world astrology into his biblical commentary; (c) the introduction to Sefer ha-Moladot (Book of Nativities), where Ibn Ezra juxtaposes world astrology and the doctrine of nativities and presents a series of original ideas about world astrology. (shrink)

Abraham ibn Ezra's scientific corpus represented an exceptional case: instead of the common Latin model embodied by the scholar coming from the Christian North to the Iberian Peninsula to initiate a translation enterprise, we have in Ibn Ezra the contrary case of an intellectual imbued with the Arabic culture, who abandons al-Andalus, roams around the Christian countries and delivers in his wandering through Italy, France and England, the scientific and cultural cargo that he amassed during his youth in al-Andalus. The (...) main purpose of this article is to provide a picture of Ibn Ezra's scientific corpus as comprehensive and detailed as possible given the present state of research. The paper will fall into two main parts: Ibn Ezra's scientific work will be broken up into three main genres: Mathematics, Astronomy, Scientific Instruments and Tools; The astrological encyclopaedia; Translations from Arabic into Hebrew. In the second part, Ibn Ezra's scientific corpus will be reassembled as a whole in order to provide a global characterization, trying to point out its general organization and shape, and to indicate its main aims and special traits revealing Ibn Ezra personal contribution. (shrink)

Le Tractatus particulares est un ouvrage en quatre parties attribué à Abraham Ibn Ezra (ca. 1089-ca. 1161), qui nous est parvenu en deux traductions latines. Le présent article montre que, malgré les attestations dans les incipits et les explicits des deux traductions latines, le Tractatus particulares ne peut pas être un ouvrage authentique d’Ibn Ezra, ni un recueil d’écrits de sa plume. L’essentiel du Tractatus particulares est constitué de traductions de l’arabe en hébreu, réalisées bien après la mort d’Ibn Ezra (...) et associées à son nom par la suite. L’article entend aussi montrer que la source hébraïque du Tractatus particulares était sans doute conçue comme un ouvrage astrologique complet, une sorte d’encyclopédie astrologique médiévale. (shrink)