Summis Desiderantes Affectibus & Malleus

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In 1484 Pope Innocent VII issued the papal bull "Summis Desiderantes Affectibus" appointing Heinrich Kramer (Institoris) and Johann Sprenger inquisitors in northern Germany.

Heinrich Kramer writes Malleus Maleficarum (The Witch Hammer).  He uses "SDA" as the book's preface, giving it phony papal authority.

Kramer also attaches Sprenger's name to the book.  Sprenger probably had little or nothing to do with the book.  He surely hated Kramer and opposed most of his work.  But Sprenger was Dean of the Faculty of Theology at the University of Cologne and a more credible theologian than Kramer.

Malleus is generally repudiated by theologians (at Cologne and elsewhere) and Kramer was denounced by the inquisition in 1490.  Nevertheless, both he and the book became popular, particularly in Germany.

Malleus became the standard guide to the diagnosis, behavior, trial, and punishment of witches for two centuries. It standardized beliefs about witches across most of Europe.

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