New insights are offered inter alia on the different ways of reception of his philosophy in the Islamic East or, more specifically, in Isma'ili thought, or in the great Shi'ite Iranian thinker, i.e., Mullah Sadra; on a recently—thus far unknown—treatise on ethics; on the phenomenon of pseudepigraphica related to Avicenna; on several innovative ideas in Avicenna's logic, physics, metaphysics and zoology; on the difficult issue of hendyades in the Avicenna Latinus; on Albert the Great's probable knowledge of Avicenna's Preface to the latter's opus magnum; on William of Auvergne's and Duns Scotus' critical use of Avicennian ideas in several aspects of their philosophy; on the significance of Avicenna for such particular doctrines as that of relation in Henry of Ghent or of evil in Thomas of Aquinas; on Avicenna's direct or indirect influence on medieval Jewish philosophy, and, more particularly, on Maimonides; on the place of Avicenna's medical thought in the Arabo-Islamic tradition and on the way it was dealt with in medieval Europe. Herewith, a serious basis is laid for a better understanding of Avicenna's thought and its spread.