Kircher, Athanasius, 1602-1680. Musurgia universalis

Musurgia Universalis, sive Ars Magna Consoni et Dissoni ("The Universal Musical Art, or the Great Art of Consonance and Dissonance") is a 1650 work by the Jesuit scholar Athanasius Kircher. It was printed in Rome by Ludovico Grignani and dedicated to Archduke Leopold Wilhelm of Austria. It was a compendium of ancient and contemporary thinking about music, its production and its effects. It explored, in particular, the relationship between the mathematical properties of music (e.g. harmony and dissonance) with health and rhetoric. The work complements two of Kircher's other books: Magnes sive de Arte Magnetica had set out the secret underlying coherence of the universe and Ars Magna Lucis et Umbrae had explored the ways of knowledge and enlightenment. What Musurgia Universalis contained, through its exploration of dissonance within harmony, was an explanation of the presence of evil in the world.