 One aspect of Campanella’s keen interest in natural philosophy was natural magic, described with particular effectiveness in the fourth book of his Del senso delle cose e della magia naturale (On the Sense of Things and On Natural Magic). The original draft of this work goes back to the young friar’s first stay in Naples, from 1590 to 1592. He came into contact there with Giambattista della Porta, one of the most celebrated Renaissance proponents of natural magic. The treatise was rewritten in the following years and was published for the first time in Frankfurt in 1620 in a Latin translation that was reprinted in Paris in 1636 and 1637. The work had a notable European diffusion, provoking discussions and contrasting opinions. In this treatise Campanella set out his vision of the natural world as a living organism, whose individual components partook of life, vitality and sensibility.