De heretico comburendo
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The De heretico comburendo (2 Hen.4 c.15) was a law passed by Parliament under King Henry IV of England in 1401, punishing heretics with burning at the stake. This law was one of the strictest religious censorship statutes ever enacted in England. In March 1401 William Sawtrey became the first Lollard to be burned.
The statute declared there were "divers false and perverse people of a certain new sect ... they make and write books, they do wickedly instruct and inform people ... and commit subversion of the said catholic faith". The sect alluded to is the Lollards, followers of John Wycliffe.
De heretico comburendo urged "that this wicked sect, preachings, doctrines, and opinions, should from henceforth cease and be utterly destroyed", and declared "that all and singular having such books or any writings of such wicked doctrine and opinions, shall really with effect deliver or cause to be delivered all such books and writings to the diocesan of the same place within forty days from the time of the proclamation of this ordinance and statute".
"And if any person ... such books in the form aforesaid do not deliver, then the diocesan of the same place in his diocese such person or persons in this behalf defamed or evidently suspected and every of them may by the authority of the said ordinance and statute cause to be arrested". If they failed to abjure their heretical beliefs, or relapsed after an initial abjuration, they would "be burnt, that such punishment may strike fear into the minds of others".
Section 6 of the Act of Supremacy 1558 (1 Eliz.1 c.1) (1559) repealed the statutes but it was not until March 1677 that a bill to take away the Crown's right to the writ was introduced in the House of Commons. It passed in that session.
Meaning and linguistics
De heretico comburendo is a Latin phrase meaning "Regarding the burning of heretics". An alternate spelling is De haeretico comburendo, reflecting the proper ancient and Middle Ages spelling (by the second century the diphthong ae had been changed in pronunciation from [ai] to [e]; most texts today use the spelling without the letter a). See Latin spelling and pronunciation for more information.
Although partial English translations of the Bible had existed for hundreds of years, the Middle English translation published under the direction of John Wycliffe in the 1380s, known as Wycliffe's Bible, was the first complete translation and the first to gain widespread acceptance and use. The Church authorities comdemned Wycliffe's translation because they deemed the commentary included with the work to be heretical, and because they feared a vernacular translation of the Bible from the Latin Vulgate, absent appropriate catechesis, would lead the ignorant laity to reject Church authority and fall into heresy.
Wycliffe was the inspiration for what would become the Lollard movement, which was considered heretical by the Church. The Constitutions of Oxford, established in 1409 by Archbishop Thomas Arundel, were further punitive measures intended to punish heresy in England that grew in large part out of the De heretico comburendo.