Bruno was a 16th-century Italian philosopher who theorized that the universe is infinite. He entered a Dominican convent as a teen but abandoned the order after being accused of heresy and began traveling Europe lecturing and teaching. His cosmological theories anticipated modern conceptions of the universe but led to his excommunication by the Roman Catholic, Calvinist, and Lutheran churches. Arrested by the Inquisition in 1593, he was burned at the stake after a trial lasting how many years? Discuss
Source: The Free Dictionary