The attribution of the Speculum Astronomiae to Albertus Magnus became a controversial issue only recently, when the great neo-Thomist historian Pierre Mandonnet suggested -- without any antecedents -- that the author was Roger Bacon rather than Albert. Mandonnet's theses were refuted by Lynn Thorndike and have since then been the subject of widespread discussion.
The present historiographical case-study considers this debate in the light of an analysis of texts by Albert himself, as well as other important authors, such as Bacon, Bonaventura, Thomas Aquinas, Witelo, Campanus of...

Astrology and Magic from the Medieval Latin and Islamic World to Renaissance Europe brings together ten of Paola Zambelli's papers on the subject, four of which are published in English for the first time. The papers in Part I of this volume deal with theories: the ideas of astrology and magic held by Renaissance thinkers; astrologers' ideas on universal history and its cycles; i.e. catastrophes and rebirths, theories; and myths regarding the spontaneous generation of man himself. Part II focuses on the role of astrologers in Renaissance society. As political counsellors, courtiers, and...