The statue of Bruno in the place where he was executed.
On this date, the Italian philosopher and Dominican friar Giordano Bruno was brought to the Campo de’ Fiori, a central Roman market square. His tongue in a gag, tied to a pole naked, Bruno was burned at the stake as a heretic. This followed his lengthy imprisonment and trial that had begun on January 27, 1593 under the Roman Inquisition.
Bruno was born at Nola, near Naples, in 1548. Originally named Filippo, he took the name Giordano when he joined the Dominicans, who trained him in Aristotelian philosophy and Thomistic theology. Independent in thinking and tempestuous in personality, he fled the order in 1576 to avoid a trial on doctrinal charges and began the wandering that characterized his life.
In his book De l’Infinito, Universo e Mondi (On the Infinite Universe and Worlds), which was published in 1584, Bruno argued that the universe was infinite, that it contained an infinite number of worlds, and that these are all inhabited by intelligent beings:
Innumerable suns exist; innumerable earths revolve around these suns in a manner similar to the way the seven planets revolve around our sun. Living beings inhabit these worlds.
In Cena de le Ceneri (The Ash Wednesday Supper), also published in 1584, Bruno defended the heliocentric theory of Copernicus, but it appears that he did not understand astronomy very well, for his theory is confused on several points.
In still another book published in 1584, De la Causa, Principio et Uno (On Cause, Prime Origin, and the One), Bruno seemed to anticipate Einstein’s theory of relativity when he wrote:
There is no absolute up or down, as Aristotle taught; no absolute position in space; but the position of a body is relative to that of other bodies. Everywhere there is incessant relative change in position throughout the universe, and the observer is always at the center of things.
Closeup of the statue of Bruno in the Campo de’ Fiori.
Some say that Bruno was executed because of his Copernicanism and his belief in the infinity of inhabited worlds, but it may have been for theological errors, such as denying the divinity of Christ. In fact, no one knows for certain the exact grounds on which he was declared a heretic because the volume or volumes of his Roman trial is missing from the Vatican archives. The only remaining record is a summary of the trial, rediscovered on November 15, 1940 and published in 1942. Some abstracts of Giordano Bruno’s works, his interrogations, some of the records of an earlier Venetian trial in 1592 against him, and some other documents copied from the original Roman trial converge in the summary, which was probably used by the Assessor of the Holy Office of that period. In this document, Bruno is quoted in one of the last interrogations by the judges of the Holy Office (maybe in April 1599) before his execution. He defended his theories as scientifically founded and by no means against the Holy Scriptures:
Firstly, I say that the theories on the movement of the earth and on the immobility of the firmament or sky are by me produced on a reasoned and sure basis, which doesn’t undermine the authority of the Holy Sciptures […]. With regard to the sun, I say that it doesn’t rise or set, nor do we see it rise or set, because, if the earth rotates on his axis, what do we mean by rising and setting[…].
Interestingly, while there is no definitive documentary evidence of Bruno’s sexual orientation, his homosexuality has long been assumed, principally on the basis of his association with figures such as Marlowe, the accusations of “immoral conduct,” and his authorship of Il Candelaio. Moreover, there is no evidence of any interest on his part in opposite-sex sexual relations.
Both historian John Addington Symonds and aesthete Walter Pater discuss Bruno in detail. Each refers to Bruno’s homosexuality as a known, if covert, fact hidden in sly innuendo. Symonds devotes an entire chapter of his groundbreaking Renaissance in Italy to the philosopher, while Pater comments in an 1889 essay that for a man of the spirit, Bruno possessed “a nature so opulently endowed [it] can hardly have been lacking in purely physical ardours.” Symonds adds that his own development as a man was due to his readings of Walt Whitman, Goethe, and Giordano Bruno: they “stripped my soul of social prejudices [so that]… I have been able to fraternise in comradeship with men of all classes and several races.”
Italian gay activist and literary historian Giovanni dall’Orto cites Bruno in his 1988 survey, “Sodomy as Phoenix: Being Homosexual in the Italian Renaissance.” In a discussion of “unnatural” desires, he notes that part of the philosopher’s offense against the Church was to ascribe the Copernican world outlook to nature itself: whatever comes from within a man is by definition within nature. Hence, Bruno’s scientific outlook challenges the very notion of “natural law” and “crime against nature.” Again quoting Bruno from De la Causa, Principio et Uno (1584):
All things are in the Universe, and the Universe is in all things: we in it, and it in us; in this way everything concurs in a perfect unity.
On August 7, 1603, the Church placed all his works on the Index Librorum Prohibitorum (List of Forbidden Books). Four hundred years (!) after his execution, official expression of “profound sorrow” and acknowledgement of error at Bruno’s condemnation to death was made during the papacy of John Paul II.
Following the 1870 Capture of Rome by the newly created Kingdom of Italy and the end of the Church’s temporal power over the city, the erection of a monument to Bruno on the site of his execution became feasible. In 1885, an international committee, including Victor Hugo, Herbert Spencer, Ernest Renan, Ernst Haeckel, Henrik Ibsen, and Ferdinand Gregorovius, was formed for that purpose. The monument was sharply opposed by the clerical party, but was finally erected by the Rome Municipality and inaugurated in 1889.
A memorial to Giordano Bruno.
On March 2, 2008, a 6-meter-tall statue of an upside-down figure, evocative of flames, was unveiled in Berlin’s Potsdamer Platz station as a memorial to Giordano Bruno and as a new reminder of the value and cost of free thought [Science 319(5869): 1467 (14 March 2008)]. The sculpture is by Alexander Polzin. Ernst Salcher of the Giordano Bruno Foundation, which helped fund the project, said the sculpture is designed to “irritate” the viewer into reflecting on the role of human reason in making the world a better place.
Also, the SETI League (not to be confused with the SETI Institute) has established “an award honoring the memory of Giordano Bruno, the Italian monk burned at the stake in 1600 for postulating the multiplicity of inhabited worlds.” It was first suggested by sociologist Donald Tarter at a SETI dinner held at the American Association for the Advancement of Science meetings in Atlanta on 17 February 1995 (coincidentally the 395th anniversary of Bruno’s death). The Bruno Award is presented annually to a person or persons making significant technical contributions to the art, science, or practice of amateur SETI.