Culture and Cosmos is a peer-reviewed academic journal in the history of astrology and cultural astronomy published in association with the Sophia Centre for the Study of Cosmology in Culture, School of Archaeology, History and Anthropology, University of Wales Trinity Saint David

Vol 18 no 2 (Autumn/Winter 2014 will be published in July/August 2016. Vol. 19 (2015) will be a double issue featuring the proceedings of the 2013 Sophia Centre conference on Celestial Magic and is scheduled for publication in September/October 2016. Vol. 20 (2016) will be a double issue featuring the proceedings of the 2014 Sophia Centre conference on the Marriage of Heaven and Earth.

Volume 3, No. 2

An Astrological Prognostication to Duke Cosimo de' Medici of Florence

Claudia Rousseau.

The Italian High Renaissance saw the high point of the use of astrology in the timing of both military and political events. It is known that Cosimo I de' Medici, Duke of Florence, delayed the decisive battle in his war against Siena in 1554, against the advice of his commanders in the field. A previously unpublished astrological prognostic may have influenced his military strategy which, in fact, led to his eventual victory at Marciano on 2 August 1554. This paper presents a discussion of the circumstances surrounding the campaign, and a translation and analysis of the prognostic sent to Duke Cosimo in March 1554 by the astrologer Francesco Formiconi.

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