Heinrich Cornelius Agrippa von Nettesheim was a German magician and occult writer, astrologer, and alchemist. He may also be considered an early feminist.
His career was diverse: secret agent, soldier, physician, orator, and law professor, in Cologne, Paris, Dole, London, Italy, Pavia, and Metz. In 1509, he set up a laboratory in Dole in the hopes of synthesizing gold, and for the next decade or so traveled Europe, making a living as an alchemist, and conversing with such important early humanist scholars as Colet and Reuchlin. In 1520, he set up a medical practice in Geneva, and in 1524 became personal physician to the queen mother at the court of King Francis I in Lyons. When the queen mother abandoned him, he began practicing medicine in Antwerp, but was later banned for practicing without a license, and became historiographer at the court of Charles V. After several stays in prison, variously for debt and criminal offenses, he died in 1535.
Agrippa's wrote on a great many topics, including marriage and military engineering, but his most important work is the three-volume De occulta philosophiae (written c. 1510, published 1531), a defense of "hidden philosophy" or magic, which draws on diverse mystical traditions - alchemy, astrology, Kabbalah. A later work, De incertitudine et vanitate scientiarum (Of the Uncertainty and Vanity of the Sciences), attacks contemporary scientific theory and practice.
Many of his opinions were controversial. His early lectures on theology angered the Church, and his defense of a woman accused of witchcraft in 1520 led to his being hounded out of Cologne by the Inquisition. In his own day, Agrippa was widely attacked as a charlatan. After his death, legends about him were plentiful. Some believed him to be not only an alchemist but a demonic magician, even a vampire. In one account, he traveled to the New World.