Giordano Bruno
Italian Dominican friar, philosopher and hermetic magus (1548–1600), born in Nola, near Naples, ordained a Dominican in his youth but a fugitive from the order from 1576 onward on charges of heresy, he led a wandering life across Italy, Switzerland, France, England and Germany, teaching, debating and publishing an immense and heterodox body of work combining cosmology, the art of memory and speculative theology. In England, under the protection of the French ambassador and frequenting the court of Elizabeth I, he wrote his most famous Italian dialogues, including The Ash Wednesday Supper and On the Infinite Universe and Worlds (1584), in which he drew from Copernicanism conclusions Copernicus himself had never dared to draw: the universe has no centre and no limits, it is infinite, and is populated by innumerable suns and inhabited worlds, each potentially with its own life —a cosmology that dissolved the Aristotelian distinction between heaven and earth and anticipated, through intuition rather than scientific proof, the modern image of a cosmos without geometric hierarchy. His philosophy, steeped in Renaissance hermeticism, Lullian art of memory and mystical pantheism, conceived God as an infinite soul immanent in the infinity of the universe, and matter and form as two inseparable aspects of a single divine substance, an idea developed in his Latin treatise On Cause, Principle and Unity (1584). Returning to Italy in 1591 on the promise of a chair at Padua that never materialised, he was denounced by a former protector, arrested by the Venetian Inquisition and handed over to Rome, where, after eight years of trial and systematically refusing to recant his cosmological and theological positions, he was burned alive at the Campo de' Fiori in 1600 —a martyrdom that made him, already in the nineteenth century and especially among anticlerical and scientific circles, an emblematic symbol of freedom of thought against religious dogmatism.