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Thinkers

Giordano Bruno

Renaissance Humanist · Europe · 1548 to 1600

Italian friar who held that the universe is infinite, with countless worlds. He was burned for his views in 1600.

What it is

Giordano Bruno was an Italian philosopher of the sixteenth century who began as a Dominican friar and became a wandering teacher and writer. He was born in 1548 at Nola, near Naples, and was burned at the stake in Rome on 17 February 1600 after a trial for heresy.

He argued that the universe is infinite and holds countless worlds, and he turned against the Aristotelian physics taught in the schools. His life was unsettled, and he was in conflict with the Catholic, Calvinist and Lutheran churches.

The main ideas

  • An infinite universe. Starting from the Copernican idea that the earth moves around the sun, he argued that the universe is infinite and holds innumerable worlds. This ran against the Aristotelian view of a finite cosmos.
  • One connected world. He saw the universe as a single whole. Form and matter were joined in one principle, and all things were parts of a basic unity.
  • Against the schools. He attacked the Aristotelian physics taught in the schools.
  • Human effort. His moral writing criticises parts of the Christian ethics of his time and sets a high value on human effort and on perfecting the mind.
  • The art of memory. He wrote on memory systems and the arts of memory.

What it looks like in practice

Imagine someone who looks up at the night sky and has always been taught that it is a set of fixed spheres around the earth. Bruno would invite them to picture the stars as other suns, each with worlds of its own, and to ask what follows for the place of human beings. This is an illustration of his argument, not a passage from his writing.

Books and moments

  • The friar. He entered the Dominican convent at Naples, took the name Giordano, and became a priest in 1572.
  • Flight. A heresy inquiry was prepared against him in 1575, and he fled the convent in 1576.
  • Years on the move. He taught and published in Geneva, Toulouse, Paris, London and German cities. In 1589 the Lutheran church at Helmstedt excommunicated him.
  • The London dialogues (1584). Among his Italian dialogues are the Ash Wednesday Supper and On the Cause, the Principle and the One.
  • Trial and death. The Inquisition tried him. He would not recant, and he was burned in Rome in 1600.

Questions and criticism

  • What was he condemned for? The list of propositions used against him is lost, and it has been debated which of his ideas were judged heretical. It is fair to ask how much of the verdict was about his cosmology and how much about his views on religion.
  • Philosopher, astronomer or something else? His work reaches across cosmology, religion, morals and memory, and it is fair to ask how these fit together.
  • A world without a centre. If the universe has no centre and holds countless worlds, it is fair to ask where that leaves the place of human beings.

Close neighbours

The pages on Nicholas of Cusa and Aristotle sit nearby. Aristotle's physics is what Bruno argued against.

Written by epchē in our own words, and checked against independent sources on 29 October 2026. The sources are listed below.

Who they connect to

Influenced by

  • Nicholas of Cusa · He took up Nicholas of Cusa's thought of an infinite universe with no centre.

Other Renaissance Humanist thinkers

Sources we used

  • Giordano Bruno · Stanford Encyclopedia of Philosophy, read on 29 October 2026
  • Giordano Bruno · Encyclopaedia Britannica, read on 29 October 2026
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