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Heresy in Christianity denotes the formal denial or doubt of a core
doctrine Doctrine (from , meaning 'teaching, instruction') is a codification (law), codification of beliefs or a body of teacher, teachings or instructions, taught principles or positions, as the essence of teachings in a given branch of knowledge or in a ...
of the Christian faith as defined by one or more of the Christian churches. The study of heresy requires an understanding of the development of
orthodoxy Orthodoxy () is adherence to a purported "correct" or otherwise mainstream- or classically-accepted creed, especially in religion. Orthodoxy within Christianity refers to acceptance of the doctrines defined by various creeds and ecumenical co ...
and the role of
creed A creed, also known as a confession of faith, a symbol, or a statement of faith, is a statement of the shared beliefs of a community (often a religious community) which summarizes its core tenets. Many Christian denominations use three creeds ...
s in the definition of orthodox beliefs, since heresy is always defined in relation to orthodoxy. Orthodoxy has been in the process of self-definition for centuries, defining itself in terms of its faith by clarifying beliefs in opposition to people or doctrines that are perceived as incorrect.


Etymology

The word ''heresy'' comes from ''haeresis'', a Latin transliteration of the Greek word αἵρεσις originally meaning choosing, choice, course of action, or in an extended sense a sect or school of thought, which by the first century came to denote warring factions and the party spirit. The word appears in the
New Testament The New Testament (NT) is the second division of the Christian biblical canon. It discusses the teachings and person of Jesus in Christianity, Jesus, as well as events relating to Christianity in the 1st century, first-century Christianit ...
, usually translated as ''
sect A sect is a subgroup of a religion, religious, politics, political, or philosophy, philosophical belief system, typically emerging as an offshoot of a larger organization. Originally, the term referred specifically to religious groups that had s ...
'', and was appropriated by the Church to mean a sect or division that threatened the unity of Christians. Heresy eventually became regarded as a departure from
orthodoxy Orthodoxy () is adherence to a purported "correct" or otherwise mainstream- or classically-accepted creed, especially in religion. Orthodoxy within Christianity refers to acceptance of the doctrines defined by various creeds and ecumenical co ...
, a sense in which
heterodoxy In religion, heterodoxy (from Ancient Greek: , + , ) means "any opinions or doctrines at variance with an official or orthodox position". ''Heterodoxy'' is also an ecclesiastical jargon term, defined in various ways by different religions and ...
was already in Christian use soon after the year 100.


Definition

Heresy is used today to denote the formal denial or doubt of a core doctrine of the Christian faithJ.D Douglas (ed). ''The New International Dictionary of the Christian Church'' Paternoster Press/ Zondervan, Exeter/Grand Rapids 1974, art ''Heresy'' as defined by one or more of the Christian churches.Cross & Livingstone (eds) ''Oxford Dictionary of the Christian Church'', 1974 art Heresy It is distinguished from both
apostasy Apostasy (; ) is the formal religious disaffiliation, disaffiliation from, abandonment of, or renunciation of a religion by a person. It can also be defined within the broader context of embracing an opinion that is contrary to one's previous re ...
and
schism A schism ( , , or, less commonly, ) is a division between people, usually belonging to an organization, movement, or religious denomination. The word is most frequently applied to a split in what had previously been a single religious body, suc ...
, apostasy being nearly always total abandonment of the Christian faith after it has been freely accepted,Prümmer, Dominic M. ''Handbook of Moral Theology'' Mercer Press 1963, sect. 201ff and schism being a formal and deliberate breach of Christian unity and an offense against charity without being based essentially on doctrine.


Early Christianity (1st century – c. 325)


Development of orthodoxy

The development of doctrine, the position of
orthodoxy Orthodoxy () is adherence to a purported "correct" or otherwise mainstream- or classically-accepted creed, especially in religion. Orthodoxy within Christianity refers to acceptance of the doctrines defined by various creeds and ecumenical co ...
, and the relationship between the early Church and early heretical groups is a matter of academic debate.
Walter Bauer Walter Bauer (; 8 August 1877 – 17 November 1960) was a German theologian, lexicographer of New Testament Greek, and scholar of the development of Early Christianity. Life Bauer was born in Königsberg, East Prussia, and raised in Marburg, ...
, in his ''Orthodoxy and Heresy in Earliest Christianity'' (1934/1971), proposed that in earliest Christianity, orthodoxy and heresy did not stand in relation to one another as primary to secondary, but in many regions heresy was the original manifestation of Christianity. Bauer reassessed as a historian the overwhelmingly dominant view that for the period of Christian origins, ecclesiastical doctrine already represented what is primary, while heresies, on the other hand somehow are a deviation from the genuine (Bauer, "Introduction"). Scholars such as Pagels and Ehrman have built on Bauer's original thesis. Drawing upon distinctions between
Jewish Christians Jewish Christians were the followers of a Jewish religious sect that emerged in Roman Judea during the late Second Temple period, under the Herodian tetrarchy (1st century AD). These Jews believed that Jesus was the prophesied Messiah and t ...
, Gentile Christians, and other groups such as Gnostics and Marcionites, they argue that early Christianity was fragmented, and with contemporaneous competing orthodoxies. Ehrman's view is that while the specifics of Bauer's demonstration were later rejected, his intuitions are broadly accepted by scholars and were confirmed beyond what Bauer might have guessed. According to H. E. W. Turner, responding to Bauer's thesis in 1954, "what became official orthodoxy was taught early on by the majority of church teachers, albeit not in fully developed form." According to Darrell Bock, a Christian apologist, Bauer's theory does not show an equality between the established church and outsiders including Simon Magus. According to Mitchell et al., each early Christian community was unique, but the tenets of the mainstream or
catholic The Catholic Church (), also known as the Roman Catholic Church, is the List of Christian denominations by number of members, largest Christian church, with 1.27 to 1.41 billion baptized Catholics Catholic Church by country, worldwid ...
Church ensured that each early Christian community did not remain isolated.


Diversity

The Ante-Nicene period (2nd–3rd century) saw the rise of a great number of Christian
sect A sect is a subgroup of a religion, religious, politics, political, or philosophy, philosophical belief system, typically emerging as an offshoot of a larger organization. Originally, the term referred specifically to religious groups that had s ...
s,
cult Cults are social groups which have unusual, and often extreme, religious, spiritual, or philosophical beliefs and rituals. Extreme devotion to a particular person, object, or goal is another characteristic often ascribed to cults. The term ...
s and movements with strong unifying characteristics lacking in the apostolic period. They had different interpretations of
Scripture Religious texts, including scripture, are texts which various religions consider to be of central importance to their religious tradition. They often feature a compilation or discussion of beliefs, ritual practices, moral commandments and ...
, particularly the divinity of Jesus and the nature of the
Trinity The Trinity (, from 'threefold') is the Christian doctrine concerning the nature of God, which defines one God existing in three, , consubstantial divine persons: God the Father, God the Son (Jesus Christ) and God the Holy Spirit, thr ...
. Some of the major
sect A sect is a subgroup of a religion, religious, politics, political, or philosophy, philosophical belief system, typically emerging as an offshoot of a larger organization. Originally, the term referred specifically to religious groups that had s ...
s,
cult Cults are social groups which have unusual, and often extreme, religious, spiritual, or philosophical beliefs and rituals. Extreme devotion to a particular person, object, or goal is another characteristic often ascribed to cults. The term ...
s and movements with different interpretations of
Scripture Religious texts, including scripture, are texts which various religions consider to be of central importance to their religious tradition. They often feature a compilation or discussion of beliefs, ritual practices, moral commandments and ...
from those of the
Proto-Orthodox The term proto-orthodox Christianity or proto-orthodoxy describes the early Christian movement that was the precursor of Christian Orthodoxy#Christianity, orthodoxy. Older literature often referred to the group as "early Catholic" in the sense th ...
church were: *
Gnosticism Gnosticism (from Ancient Greek language, Ancient Greek: , Romanization of Ancient Greek, romanized: ''gnōstikós'', Koine Greek: Help:IPA/Greek, �nostiˈkos 'having knowledge') is a collection of religious ideas and systems that coalesced ...
(particularly
Valentinianism Valentinianism was one of the major Gnostic Christian movements. Founded by Valentinus ( CE – CE) in the 2nd century, its influence spread widely, not just within the Roman Empire but also from northwest Africa to Egypt through to Asia Minor ...
) – reliance on revealed knowledge from an unknowable God, a distinct divinity from the Demiurge who created and oversees the material world. * Marcionism – the
God In monotheistic belief systems, God is usually viewed as the supreme being, creator, and principal object of faith. In polytheistic belief systems, a god is "a spirit or being believed to have created, or for controlling some part of the un ...
of
Jesus Jesus (AD 30 or 33), also referred to as Jesus Christ, Jesus of Nazareth, and many Names and titles of Jesus in the New Testament, other names and titles, was a 1st-century Jewish preacher and religious leader. He is the Jesus in Chris ...
was a different God from the
God In monotheistic belief systems, God is usually viewed as the supreme being, creator, and principal object of faith. In polytheistic belief systems, a god is "a spirit or being believed to have created, or for controlling some part of the un ...
of the
Old Testament The Old Testament (OT) is the first division of the Christian biblical canon, which is based primarily upon the 24 books of the Hebrew Bible, or Tanakh, a collection of ancient religious Hebrew and occasionally Aramaic writings by the Isr ...
. *
Montanism Montanism (), known by its adherents as the New Revelation, was an History of Christianity#Early Christianity (c. 31/33–324), early Christian movement of the Christianity in the 2nd century, mid-to-late 2nd century, later referred to by the n ...
– relied on prophetic
revelation Revelation, or divine revelation, is the disclosing of some form of Religious views on truth, truth or Knowledge#Religion, knowledge through communication with a deity (god) or other supernatural entity or entities in the view of religion and t ...
s from the
Holy Spirit The Holy Spirit, otherwise known as the Holy Ghost, is a concept within the Abrahamic religions. In Judaism, the Holy Spirit is understood as the divine quality or force of God manifesting in the world, particularly in acts of prophecy, creati ...
. *
Adoptionism Adoptionism, also called dynamic monarchianism, is an early Christian nontrinitarian theological doctrine, subsequently revived in various forms, which holds that Jesus was adopted as the Son of God at his baptism, his resurrection, or his ...
– Jesus was not born the
Son of God Historically, many rulers have assumed titles such as the son of God, the son of a god or the son of heaven. The term "Son of God" is used in the Hebrew Bible as another way to refer to humans who have a special relationship with God. In Exo ...
, but was adopted at his
baptism Baptism (from ) is a Christians, Christian sacrament of initiation almost invariably with the use of water. It may be performed by aspersion, sprinkling or affusion, pouring water on the head, or by immersion baptism, immersing in water eit ...
,
resurrection Resurrection or anastasis is the concept of coming back to life after death. Reincarnation is a similar process hypothesized by other religions involving the same person or deity returning to another body. The disappearance of a body is anothe ...
or ascension. * Docetism – Jesus was pure spirit and his physical form an illusion.


Proto-orthodoxy

Before AD 313, the heretical nature of some beliefs was a matter of much debate within the churches, and there was no true mechanism in place to resolve the various differences of beliefs. Heresy was to be approached by the leader of the church according to
Eusebius Eusebius of Caesarea (30 May AD 339), also known as Eusebius Pamphilius, was a historian of Christianity, exegete, and Christian polemicist from the Roman province of Syria Palaestina. In about AD 314 he became the bishop of Caesarea Maritima. ...
, author of the '' Church History''. Early attacks upon alleged heresies formed the matter of
Tertullian Tertullian (; ; 155 – 220 AD) was a prolific Early Christianity, early Christian author from Roman Carthage, Carthage in the Africa (Roman province), Roman province of Africa. He was the first Christian author to produce an extensive co ...
's ''Prescription Against Heretics'' (in 44 chapters, written from Rome), and of
Irenaeus Irenaeus ( or ; ; ) was a Greeks, Greek bishop noted for his role in guiding and expanding Christianity, Christian communities in the southern regions of present-day France and, more widely, for the development of Christian theology by oppos ...
' ''
Against Heresies ''Against Heresies'' (Koine Greek: Ἔλεγχος καὶ ἀνατροπὴ τῆς ψευδωνύμου γνώσεως, ''Elenchos kai anatropē tēs pseudōnymou gnōseōs'', "Refutation and Overthrowal of Knowledge falsely so-called"), som ...
'' (c. 180, in five volumes), written in Lyon after his return from a visit to Rome. The letters of
Ignatius of Antioch Ignatius of Antioch (; ; died 108/140), also known as Ignatius Theophorus (), was an early Christian writer and Patriarch of Antioch. While en route to Rome, where he met his Christian martyrs, martyrdom, Ignatius wrote a series of letters. This ...
and Polycarp of Smyrna to various churches warned against false teachers, and the '' Epistle of Barnabas'' accepted by many Christians as part of Scripture in the 2nd century, warned about mixing Judaism with Christianity, as did other writers, leading to decisions reached in the first ecumenical council, which was convoked by the Emperor Constantine at Nicaea in 325, in response to further disruptive polemical controversy within the Christian community, in that case Arianist disputes over the nature of the Trinity. Irenaeus ( – ) was the first to argue that his orthodox position was the same faith that
Jesus Jesus (AD 30 or 33), also referred to as Jesus Christ, Jesus of Nazareth, and many Names and titles of Jesus in the New Testament, other names and titles, was a 1st-century Jewish preacher and religious leader. He is the Jesus in Chris ...
gave to the apostles, and that the identity of the apostles, their successors, and the teachings of the same were all well-known public knowledge. This was therefore an early argument supported by
apostolic succession Apostolic succession is the method whereby the Christian ministry, ministry of the Christian Church is considered by some Christian denominations to be derived from the Twelve Apostles, apostles by a continuous succession, which has usually been ...
. Irenaeus first established the doctrine of four gospels and no more, with the synoptic gospels interpreted in the light of the
Gospel of John The Gospel of John () is the fourth of the New Testament's four canonical Gospels. It contains a highly schematic account of the ministry of Jesus, with seven "Book of Signs, signs" culminating in the raising of Lazarus (foreshadowing the ...
. Irenaeus' opponents, however, claimed to have received secret teachings from Jesus via other apostles which were not publicly known. Gnosticism is predicated on the existence of such hidden knowledge, but brief references to private teachings of Jesus have also survived in the canonic Scripture as did warning by the Christ that there would be
false prophet In religion, a false prophet or pseudoprophet is a person who falsely claims the gift of prophecy or divine inspiration, or to speak for God, or who makes such claims for evil ends. Often, someone who is considered a "true prophet" by some peop ...
s or false teachers. Irenaeus' opponents also claimed that the wellsprings of divine inspiration were not dried up, which is the doctrine of continuing revelation.


Late Antiquity (313–476) and Early Middle Ages (476–799)


Christology

The earliest controversies in Late Antiquity were generally
Christological In Christianity, Christology is a branch of theology that concerns Jesus. Different denominations have different opinions on questions such as whether Jesus was human, divine, or both, and as a messiah what his role would be in the freeing of ...
in nature, concerning the interpretation of Jesus' (eternal) divinity and humanity. In the 4th century,
Arius Arius (; ; 250 or 256 – 336) was a Cyrenaica, Cyrenaic presbyter and asceticism, ascetic. He has been regarded as the founder of Arianism, which holds that Jesus Christ was not Eternity, coeternal with God the Father, but was rather created b ...
and
Arianism Arianism (, ) is a Christology, Christological doctrine which rejects the traditional notion of the Trinity and considers Jesus to be a creation of God, and therefore distinct from God. It is named after its major proponent, Arius (). It is co ...
held that Jesus, while not primarily mortal, was not always divine and was, therefore, of lesser status than
God the Father God the Father is a title given to God in Christianity. In mainstream trinitarian Christianity, God the Father is regarded as the first Person of the Trinity, followed by the second person, Jesus Christ the Son, and the third person, God th ...
. Arianism was condemned at the Council of Nicea (325) but nevertheless dominated most of the church for the greater part of the 4th century, often with the aid of Roman emperors who favoured them.
Trinitarianism The Trinity (, from 'threefold') is the Christian doctrine concerning the nature of God, which defines one God existing in three, , consubstantial divine persons: God the Father, God the Son (Jesus Christ) and God the Holy Spirit, three ...
held that
God the Father God the Father is a title given to God in Christianity. In mainstream trinitarian Christianity, God the Father is regarded as the first Person of the Trinity, followed by the second person, Jesus Christ the Son, and the third person, God th ...
,
God the Son God the Son (, ; ) is the second Person of the Trinity in Christian theology. According to Christian doctrine, God the Son, in the form of Jesus Christ, is the incarnation of the eternal, pre-existent divine ''Logos'' (Koine Greek for "word") ...
, and the
Holy Spirit The Holy Spirit, otherwise known as the Holy Ghost, is a concept within the Abrahamic religions. In Judaism, the Holy Spirit is understood as the divine quality or force of God manifesting in the world, particularly in acts of prophecy, creati ...
were all strictly one being with three hypostases. The Euchites, a 4th-century antinomian sect from
Mesopotamia Mesopotamia is a historical region of West Asia situated within the Tigris–Euphrates river system, in the northern part of the Fertile Crescent. Today, Mesopotamia is known as present-day Iraq and forms the eastern geographic boundary of ...
, held that the triune God transformed himself into a single hypostasis to unite with the souls of the perfect. They were anti-clerical and rejected baptism and the sacraments, believing that the passions could be overcome and perfection achieved through prayer. Many groups held dualistic beliefs, maintaining that reality was composed of two radically opposing parts: matter, usually seen as evil, and spirit, seen as good. Docetism held that Jesus's humanity was merely an illusion, thus denying the incarnation. Others held that God created both the material and spiritual worlds and were, therefore, both good and that this was represented in the unified divine and human natures of Jesus. The orthodox teaching, as it developed in response to these interpretations, is that Jesus was fully divine and at the same time fully human and that the three persons of the
Trinity The Trinity (, from 'threefold') is the Christian doctrine concerning the nature of God, which defines one God existing in three, , consubstantial divine persons: God the Father, God the Son (Jesus Christ) and God the Holy Spirit, thr ...
are co-equal and co-eternal.


Legal suppression of heresies

The legalisation of Christianity under
Constantine I Constantine I (27 February 27222 May 337), also known as Constantine the Great, was a Roman emperor from AD 306 to 337 and the first Roman emperor to convert to Christianity. He played a Constantine the Great and Christianity, pivotal ro ...
in AD 313 led to the uniformity of proto-orthodox beliefs and the formulation of dogma through canons from the ecumenical councils. The first known usage of the term 'heresy' in a civil legal context was in 380 by the "
Edict of Thessalonica An edict is a decree or announcement of a law, often associated with monarchies, but it can be under any official authority. Synonyms include "dictum" and "pronouncement". ''Edict'' derives from the Latin wikt:edictum#Latin, edictum. Notable ed ...
" of
Theodosius I Theodosius I ( ; 11 January 347 – 17 January 395), also known as Theodosius the Great, was Roman emperor from 379 to 395. He won two civil wars and was instrumental in establishing the Nicene Creed as the orthodox doctrine for Nicene C ...
. Before the issuance of this edict, the Church lacked state-sponsored support for any specific legal mechanism to address what it identified as 'heresy.' With this edict, the distinction between the Church and the Roman government became less clear. One of the outcomes of this blurring of Church and State was a sharing of State powers of legal enforcement between Church and State authorities, with the state enforcing what it determined to be orthodox teaching. Within five years of the official criminalization of heresy by the emperor, the first Christian heretic,
Priscillian Priscillian (in Latin: ''Priscillianus''; Gallaecia, – Augusta Treverorum, Gallia Belgica, ) was a wealthy nobleman of Roman Hispania who promoted a strict form of Christian asceticism. He became bishop of Ávila in 380. Certain practices of his ...
, was executed in 385 by Roman officials. For some years after the
Protestant Reformation The Reformation, also known as the Protestant Reformation or the European Reformation, was a time of major theological movement in Western Christianity in 16th-century Europe that posed a religious and political challenge to the papacy and ...
, Protestant denominations were also known to execute those whom they considered heretics. The edict of
Theodosius II Theodosius II ( ; 10 April 401 – 28 July 450), called "the Calligraphy, Calligrapher", was Roman emperor from 402 to 450. He was proclaimed ''Augustus (title), Augustus'' as an infant and ruled as the Eastern Empire's sole emperor after the ...
(435) provided severe punishments for those who had or spread writings of
Nestorius Nestorius of Constantinople (; ; ) was an early Christian prelate who served as Archbishop of Constantinople from 10 April 428 to 11 July 431. A Christian theologian from the Catechetical School of Antioch, several of his teachings in the fi ...
. Those who possessed writings of Arius were sentenced to death.


Ecumenical councils

Seven ecumenical councils were convened between 325 and 787. These were primarily concerned with Christological disputes: #The First Ecumenical Council was convoked by the Roman emperor Constantine at Nicaea in 325 and presided over by Pope Alexander I of Alexandria, with over 300 bishops condemning the view of
Arius Arius (; ; 250 or 256 – 336) was a Cyrenaica, Cyrenaic presbyter and asceticism, ascetic. He has been regarded as the founder of Arianism, which holds that Jesus Christ was not Eternity, coeternal with God the Father, but was rather created b ...
that the Son is a created being inferior to the Father. Each phrase in the
Nicene Creed The Nicene Creed, also called the Creed of Constantinople, is the defining statement of belief of Nicene Christianity and in those Christian denominations that adhere to it. The original Nicene Creed was first adopted at the First Council of N ...
, formulated at this Council of Nicaea (AD 325), addresses some aspect that had been under passionate discussion prior to Constantine I. Nevertheless, Arianism dominated most of the Church for the greater part of the 4th century, often with the aid of the Roman emperors who favoured them. #The Second Ecumenical Council was held at Constantinople in 381, presided over by the Patriarchs of Alexandria and Antioch, with 150 bishops. It defined the nature of the Holy Spirit against those asserting his inequality with the other persons of the Trinity. This council also condemned Arianism. #The Third Ecumenical Council was held in Ephesus, a stronghold of Cyrillian Christianity, in 431. It was presided over by the Patriarch of Alexandria, with 250 bishops, and was mired in controversy because of the absence of the Patriarchs of Constantinople and Antioch, the absence of the Syrian clergy, and violence directed against Nestorius and his supporters. It affirmed that Mary is the "Bearer of God" (), contrary to the teachings of
Nestorius Nestorius of Constantinople (; ; ) was an early Christian prelate who served as Archbishop of Constantinople from 10 April 428 to 11 July 431. A Christian theologian from the Catechetical School of Antioch, several of his teachings in the fi ...
, whom it anathematized. A mirror Council held by Nestorius, the Patriarch of Antioch, and the Syrian clergy affirmed Mary as , "Bearer of Christ", and anathematized
Cyril of Alexandria Cyril of Alexandria (; or ⲡⲓ̀ⲁⲅⲓⲟⲥ Ⲕⲓⲣⲓⲗⲗⲟⲥ;  376–444) was the Patriarch of Alexandria from 412 to 444. He was enthroned when the city was at the height of its influence and power within the Roman Empire ...
. #The Fourth Ecumenical Council was held in Chalcedon in 451, with the Patriarch of Constantinople presiding over 500 bishops. This council affirmed that Jesus has two natures: God and man, distinct yet always in perfect union. It was based largely on
Pope Leo I Pope Leo I () ( 391 – 10 November 461), also known as Leo the Great (; ), was Bishop of Rome from 29 September 440 until his death on 10 November 461. He is the first of the three Popes listed in the ''Annuario Pontificio'' with the title "the ...
's ''Tome''. It condemned
monophysitism Monophysitism ( ) or monophysism ( ; from Greek , "solitary" and , "nature") is a Christological doctrine that states that there was only one nature—the divine—in the person of Jesus Christ, who was the incarnated Word. It is rejected as he ...
and would be influential in refuting
monothelitism Monothelitism, or monotheletism was a theological doctrine in Christianity that was proposed in the 7th century, but was ultimately rejected by the sixth ecumenical council. It held Christ as having only one will and was thus contrary to dyoth ...
. #The Fifth Ecumenical Council was the second of Constantinople in 553. It interpreted the decrees of Chalcedon and further explained the relationship between Jesus's two natures; it also condemned the teachings of
Origen Origen of Alexandria (), also known as Origen Adamantius, was an Early Christianity, early Christian scholar, Asceticism#Christianity, ascetic, and Christian theology, theologian who was born and spent the first half of his career in Early cent ...
on the
pre-existence Pre-existence, premortal existence, beforelife, or life before birth, is the belief that each individual human soul existed before mortal conception, and at some point before birth enters or is placed into the body. Concepts of pre-existence c ...
of the soul. #The Sixth Ecumenical Council was the third of Constantinople, in 681, declaring that Jesus had two wills of his two natures, human and divine, contrary to the teachings of the monothelites. #The Seventh Ecumenical Council was called by Empress Regent
Irene of Athens Irene of Athens (, ; 750/756 – 9 August 803), surname Sarantapechaena (, ), was Byzantine empress consort to Emperor Leo IV from 775 to 780, regent during the childhood of their son Constantine VI from 780 until 790, co-ruler from 792 unti ...
in 787, the second in Nicaea. It supported the
veneration Veneration (; ), or veneration of saints, is the act of honoring a saint, a person who has been identified as having a high degree of sanctity or holiness. Angels are shown similar veneration in many religions. Veneration of saints is practiced, ...
of
icon An icon () is a religious work of art, most commonly a painting, in the cultures of the Eastern Orthodox, Oriental Orthodox, Catholic Church, Catholic, and Lutheranism, Lutheran churches. The most common subjects include Jesus, Mary, mother of ...
s while forbidding their worship. It is often referred to as "The Triumph of Orthodoxy". Not all these Councils have been universally recognised as
ecumenical Ecumenism ( ; alternatively spelled oecumenism)also called interdenominationalism, or ecumenicalismis the concept and principle that Christians who belong to different Christian denominations should work together to develop closer relationships ...
. In addition, the
Catholic Church The Catholic Church (), also known as the Roman Catholic Church, is the List of Christian denominations by number of members, largest Christian church, with 1.27 to 1.41 billion baptized Catholics Catholic Church by country, worldwid ...
has convened numerous other councils that it deems have the same authority, making a total of twenty-one Ecumenical Councils recognised by the Catholic Church. The
Assyrian Church of the East The Assyrian Church of the East (ACOE), sometimes called the Church of the East and officially known as the Holy Apostolic Catholic Assyrian Church of the East, is an Eastern Christianity, Eastern Syriac Christianity, Syriac Christian denomin ...
accepts only the first two, and
Oriental Orthodoxy The Oriental Orthodox Churches are Eastern Christian churches adhering to Miaphysite Christology, with approximately 50 million members worldwide. The Oriental Orthodox Churches adhere to the Nicene Christian tradition. Oriental Orthodoxy is ...
only three. Pope Sergius I rejected the
Quinisext Council The Quinisext Council (; , literally meaning, ''Fifth-Sixth Meeting''), i.e., the Fifth-Sixth Council, often called the Council ''in Trullo'', Trullan Council, or the Penthekte Synod, was a church council held in 692 at Constantinople under Ju ...
of 692 (see also
Pentarchy Pentarchy (, ) was a model of Church organization formulated in the laws of Emperor Justinian I () of the Roman Empire. In this model, the Christian Church is governed by the heads (patriarchs) of the five major episcopal sees of the Roman Em ...
). The Fourth Council of Constantinople of 869–870 and 879–880 are disputed by Catholicism and
Eastern Orthodoxy Eastern Orthodoxy, otherwise known as Eastern Orthodox Christianity or Byzantine Christianity, is one of the three main Branches of Christianity, branches of Chalcedonian Christianity, alongside Catholic Church, Catholicism and Protestantism ...
. Present-day nontrinitarians, such as Unitarians,
Latter-day Saints The Church of Jesus Christ of Latter-day Saints, informally known as the LDS Church or Mormon Church, is a Nontrinitarianism, nontrinitarian Restorationism, restorationist Christianity, Christian Christian denomination, denomination and the ...
and other
Mormons Mormons are a Religious denomination, religious and ethnocultural group, cultural group related to Mormonism, the principal branch of the Latter Day Saint movement started by Joseph Smith in upstate New York during the 1820s. After Smith's d ...
, and
Jehovah's Witnesses Jehovah's Witnesses is a Christian denomination that is an outgrowth of the Bible Student movement founded by Charles Taze Russell in the nineteenth century. The denomination is nontrinitarian, millenarian, and restorationist. Russell co-fou ...
, reject all seven Councils. Some Eastern Orthodox consider the following council to be ecumenical, although this is not universally agreed upon: #The Fifth Council of Constantinople was actually a series of councils held between 1341 and 1351. It affirmed the hesychastic theology of St.
Gregory Palamas Gregory Palamas (; ; – 1357/1359) was a Byzantine Greek theologian and Eastern Orthodox cleric of the late Byzantine period. A monk of Mount Athos (modern Greece) and later archbishop of Thessalonica, he is famous for his defense of hesyc ...
and condemned the philosopher Barlaam of Calabria. #In addition to these councils, several significant councils have been meant to define the Eastern Orthodox position further. They are the Synods of Constantinople in 1484, 1583, 1755, 1819, and
1872 Events January * January 12 – Yohannes IV is crowned Emperor of Ethiopia in Axum, the first ruler crowned in that city in over 500 years. *January 20 – The Cavite mutiny was an uprising of Filipino military personnel of Fort S ...
, the Synod of Iași, 1642, and the Pan-Orthodox Synod of Jerusalem, 1672. Some individual examples of the execution of Eastern Orthodox heretics do exist, such as the execution of
Avvakum Avvakum Petrov (; 20 November 1620/1621 – 14 April 1682; also spelled Awakum) was a Russian Old Believer and protopope of the Kazan Cathedral on Red Square who led the opposition to Patriarch Nikon's reforms of the Russian Orthodox Church. H ...
in 1682.


High Middle Ages (800–1299) and Late Middle Ages and the early Renaissance (1300–1520)

From the late 11th century onward, heresy once again came to be a concern for Catholic authorities, as reports became increasingly common. The reasons for this are still not fully understood, but the causes for this new period of heresy include popular response to the 11th-century clerical reform movement, greater lay familiarity with the
Bible The Bible is a collection of religious texts that are central to Christianity and Judaism, and esteemed in other Abrahamic religions such as Islam. The Bible is an anthology (a compilation of texts of a variety of forms) originally writt ...
, exclusion of lay people from
sacrament A sacrament is a Christian rite which is recognized as being particularly important and significant. There are various views on the existence, number and meaning of such rites. Many Christians consider the sacraments to be a visible symbol ...
al activity, and more rigorous definition and supervision of Catholic dogma. The question of how heresy should be suppressed was not resolved, and there was initially substantial clerical resistance to the use of physical force by secular authorities to correct spiritual deviance. As heresy was viewed with increasing concern by the
papacy The pope is the bishop of Rome and the Head of the Church#Catholic Church, visible head of the worldwide Catholic Church. He is also known as the supreme pontiff, Roman pontiff, or sovereign pontiff. From the 8th century until 1870, the po ...
, however, the secular arm was used more frequently and freely during the 12th century and afterward.


Medieval heresies

There were many Christian
sect A sect is a subgroup of a religion, religious, politics, political, or philosophy, philosophical belief system, typically emerging as an offshoot of a larger organization. Originally, the term referred specifically to religious groups that had s ...
s,
cult Cults are social groups which have unusual, and often extreme, religious, spiritual, or philosophical beliefs and rituals. Extreme devotion to a particular person, object, or goal is another characteristic often ascribed to cults. The term ...
s, movements and individuals throughout the Middle Ages whose teachings were deemed heretical by the established church, such as: * Paulicians – an
Armenia Armenia, officially the Republic of Armenia, is a landlocked country in the Armenian Highlands of West Asia. It is a part of the Caucasus region and is bordered by Turkey to the west, Georgia (country), Georgia to the north and Azerbaijan to ...
n group (6th to 9th centuries) who sought a return to the purity of the church at the time of
Paul the Apostle Paul, also named Saul of Tarsus, commonly known as Paul the Apostle and Saint Paul, was a Apostles in the New Testament, Christian apostle ( AD) who spread the Ministry of Jesus, teachings of Jesus in the Christianity in the 1st century, first ...
. * Tondrakians – an
Armenia Armenia, officially the Republic of Armenia, is a landlocked country in the Armenian Highlands of West Asia. It is a part of the Caucasus region and is bordered by Turkey to the west, Georgia (country), Georgia to the north and Azerbaijan to ...
n group (9th to 11th centuries) who advocated the abolition of the Church along with all its traditional rites. *
Bogomils Bogomilism (; ; sh-Latn-Cyrl, separator=" / ", bogumilstvo, богумилство) was a Christian neo-Gnostic, dualist sect founded in the First Bulgarian Empire by the priest Bogomil during the reign of Tsar Peter I in the 10th century. I ...
– a group arising in the 11th century in
Bulgaria Bulgaria, officially the Republic of Bulgaria, is a country in Southeast Europe. It is situated on the eastern portion of the Balkans directly south of the Danube river and west of the Black Sea. Bulgaria is bordered by Greece and Turkey t ...
who sought a return to the spirituality of the early Christians and opposed established forms of government and church. * Gundolfo – an itinerant 11th century preacher near
Lille Lille (, ; ; ; ; ) is a city in the northern part of France, within French Flanders. Positioned along the Deûle river, near France's border with Belgium, it is the capital of the Hauts-de-France Regions of France, region, the Prefectures in F ...
,
France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...
, who taught that
salvation Salvation (from Latin: ''salvatio'', from ''salva'', 'safe, saved') is the state of being saved or protected from harm or a dire situation. In religion and theology, ''salvation'' generally refers to the deliverance of the soul from sin and its c ...
was achieved through a virtuous life of abandoning the world, restraining the appetites of the flesh, earning food by the labor of hands, doing no injury to anyone, and extending charity to everyone of their own faith. * Cathars – a major Christian movement in the
Languedoc The Province of Languedoc (, , ; ) is a former province of France. Most of its territory is now contained in the modern-day region of Occitanie in Southern France. Its capital city was Toulouse. It had an area of approximately . History ...
region of southern
France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...
from the 12th to 14th centuries. The Cathars believed that human
soul The soul is the purported Mind–body dualism, immaterial aspect or essence of a Outline of life forms, living being. It is typically believed to be Immortality, immortal and to exist apart from the material world. The three main theories that ...
s were the spirits of
angel An angel is a spiritual (without a physical body), heavenly, or supernatural being, usually humanoid with bird-like wings, often depicted as a messenger or intermediary between God (the transcendent) and humanity (the profane) in variou ...
s trapped within the physical creation of an evil god. Through living a pure and sinless life, the soul could become perfect and free from the snare of matter. * Arnoldists – a 12th-century group, inspired by the example of controversial figure Arnold of Brescia (c. 1090 – June 1155), from
Lombardy The Lombardy Region (; ) is an administrative regions of Italy, region of Italy that covers ; it is located in northern Italy and has a population of about 10 million people, constituting more than one-sixth of Italy's population. Lombardy is ...
who criticized the wealth of the
Catholic Church The Catholic Church (), also known as the Roman Catholic Church, is the List of Christian denominations by number of members, largest Christian church, with 1.27 to 1.41 billion baptized Catholics Catholic Church by country, worldwid ...
and preached against
baptism Baptism (from ) is a Christians, Christian sacrament of initiation almost invariably with the use of water. It may be performed by aspersion, sprinkling or affusion, pouring water on the head, or by immersion baptism, immersing in water eit ...
and the
Eucharist The Eucharist ( ; from , ), also called Holy Communion, the Blessed Sacrament or the Lord's Supper, is a Christianity, Christian Rite (Christianity), rite, considered a sacrament in most churches and an Ordinance (Christianity), ordinance in ...
. * Petrobrusians were 12th century followers of Peter of Bruys in southeastern
France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...
who rejected the authority of the
Church Fathers The Church Fathers, Early Church Fathers, Christian Fathers, or Fathers of the Church were ancient and influential Christian theologians and writers who established the intellectual and doctrinal foundations of Christianity. The historical peri ...
and of the Catholic Church, opposing clerical celibacy,
infant baptism Infant baptism, also known as christening or paedobaptism, is a Christian sacramental practice of Baptism, baptizing infants and young children. Such practice is done in the Catholic Church, the Eastern Orthodox and Oriental Orthodox churches, va ...
, prayers for the dead and organ music. * Henricans were 12th century followers of Henry of Lausanne in France. They rejected the doctrinal and disciplinary authority of the church, did not recognize any form of
worship Worship is an act of religious devotion usually directed towards a deity or God. For many, worship is not about an emotion, it is more about a recognition of a God. An act of worship may be performed individually, in an informal or formal group, ...
or
liturgy Liturgy is the customary public ritual of worship performed by a religious group. As a religious phenomenon, liturgy represents a communal response to and participation in the sacred through activities reflecting praise, thanksgiving, remembra ...
and denied the
sacraments A sacrament is a Christian rite which is recognized as being particularly important and significant. There are various views on the existence, number and meaning of such rites. Many Christians consider the sacraments to be a visible symbol of ...
. *
Waldensians The Waldensians, also known as Waldenses (), Vallenses, Valdesi, or Vaudois, are adherents of a church tradition that began as an ascetic movement within Western Christianity before the Reformation. Originally known as the Poor of Lyon in the l ...
– a movement that began in the 12th century in
Lyon Lyon (Franco-Provençal: ''Liyon'') is a city in France. It is located at the confluence of the rivers Rhône and Saône, to the northwest of the French Alps, southeast of Paris, north of Marseille, southwest of Geneva, Switzerland, north ...
,
France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...
, and still exists today. They held that
Apostolic poverty Apostolic poverty is a Christian doctrine professed in the thirteenth century by the newly formed religious orders, known as the mendicant orders, in direct response to calls for reform in the Roman Catholic Church. In this, these orders attempt ...
was the way to spiritual perfection and rejected what they perceived as the
idolatry Idolatry is the worship of an idol as though it were a deity. In Abrahamic religions (namely Judaism, Samaritanism, Christianity, Islam, and the Baháʼí Faith) idolatry connotes the worship of something or someone other than the Abrahamic ...
of the
Catholic Church The Catholic Church (), also known as the Roman Catholic Church, is the List of Christian denominations by number of members, largest Christian church, with 1.27 to 1.41 billion baptized Catholics Catholic Church by country, worldwid ...
. * Humiliati – a 12th-century group from northern Italy who embraced poverty, charity and mortification. Initially approved by the church, they were suppressed for disobedience in 1571. * Brethren of the Free Spirit – a term applied in the 13th century to those, primarily in the
Low Countries The Low Countries (; ), historically also known as the Netherlands (), is a coastal lowland region in Northwestern Europe forming the lower Drainage basin, basin of the Rhine–Meuse–Scheldt delta and consisting today of the three modern "Bene ...
,
Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...
,
France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...
,
Bohemia Bohemia ( ; ; ) is the westernmost and largest historical region of the Czech Republic. In a narrow, geographic sense, it roughly encompasses the territories of present-day Czechia that fall within the Elbe River's drainage basin, but historic ...
and northern
Italy Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land b ...
, who believed that the
sacraments A sacrament is a Christian rite which is recognized as being particularly important and significant. There are various views on the existence, number and meaning of such rites. Many Christians consider the sacraments to be a visible symbol of ...
were unnecessary for
salvation Salvation (from Latin: ''salvatio'', from ''salva'', 'safe, saved') is the state of being saved or protected from harm or a dire situation. In religion and theology, ''salvation'' generally refers to the deliverance of the soul from sin and its c ...
, that the
soul The soul is the purported Mind–body dualism, immaterial aspect or essence of a Outline of life forms, living being. It is typically believed to be Immortality, immortal and to exist apart from the material world. The three main theories that ...
could be perfected through imitating the life of
Christ Jesus ( AD 30 or 33), also referred to as Jesus Christ, Jesus of Nazareth, and many other names and titles, was a 1st-century Jewish preacher and religious leader. He is the Jesus in Christianity, central figure of Christianity, the M ...
, and that the perfected soul was free of
sin In religious context, sin is a transgression against divine law or a law of the deities. Each culture has its own interpretation of what it means to commit a sin. While sins are generally considered actions, any thought, word, or act considered ...
and beyond all
ecclesiastical {{Short pages monitor * *


Further reading

* * * *Latinovic, Vladimir (2020)
Who Do You Call a Heretic? Fluid Notions of Orthodoxy and Heresy in Late Antiquity
Palgrave. . {{DEFAULTSORT:Heresy Christian terminology Christology