Cosimo Ruggeri

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Cosimo Ruggeri, in France called Côme Ruggieri (died 28 March 1615), was an Italian astrologer, alchemist, haruspex, favourite, and influential adviser of the queen regent of France, Catherine de' Medici. He was the subject of many legends in the folklore of Catherine de' Medici, and reputed as a master of the occult, black magic, and witchcraft during his lifetime.