Gundolfo or Gundulf is purported to be a teacher of Proto-Protestant Christian doctrines in the early 11th century. Of Italian origin, he was said to be active in the bishopric of Cambrai-Arras in northern France (south of Lille) around 1025 during the episcopate of Bishop Gerard of Florennes. [1]
Gundulfo rejected the sacraments and authority of the Catholic Church and claimed salvation by a righteousness based on his reading of the Gospels rather than on Catholic Church dogma. His teachings emphasized that salvation was achieved through a virtuous life of abandoning the world, [2] restraining the appetites of the flesh, [3] earning food by the labor of hands, [4] doing no injury to anyone, and extending charity to everyone of their own faith.
Following a lengthy sermon by Gerard, followers of Gundulfo recanted their radical beliefs and were received back into the Church. The source of Gundolfo's teachings is unknown but may be compared to Catharism and to the Waldensians.
Details surrounding the remainder of Gundolfo's life are scarce, including when and where he died.
Because Gundolfo and his followers are only known from a single, uncorroborated text from around 1200 in Cîteaux, a prominent monastic house battling heresy, there are doubts as to the historical veracity of Gundolfo's existence. [5]
It is possible that the narrative of Gundulfo's followers being questioned and corrected by Bishop Gerard was a rhetorical framing device for the treatise against heresy he was already intending to publish. However, the fact that it does not contain reference to other radical positions being preached in the region lends some credibility to the figure and story having some basis in historical reality. [6]
Catharism was a Christian dualist or Gnostic movement between the 12th and 14th centuries which thrived in Southern Europe, particularly in northern Italy and southern France. Followers were described as Cathars and referred to themselves as Good Christians; in modern times, they are mainly remembered for a prolonged period of mutual conflict and religious persecution – sometimes regarded as genocide – by the Catholic Church which deemed Catharism a heretical sect.
Irenaeus was a Greek bishop noted for his role in guiding and expanding Christian communities in the southern regions of present-day France and, more widely, for the development of Christian theology by combating heterodox or Gnostic interpretations of Scripture as heresy and defining proto-orthodoxy. Originating from Smyrna, he had seen and heard the preaching of Polycarp, who in turn was said to have heard John the Evangelist, and thus was the last-known living connection with the Apostles.
Pelagius was a Romano-British theologian known for promoting a system of doctrines which emphasized human choice in salvation and denied original sin. Pelagius was accused of heresy at the synod of Jerusalem in 415 and his doctrines were harshly criticized by Augustine of Hippo, especially the Pelagian views about mankind’s good nature and individual responsibility for choosing asceticism. Pelagius especially stressed the freedom of human will. Very little is known about the personal life and career of Pelagius.
Priscillianism was a Christian sect developed in the Iberian Peninsula under the Roman Empire in the 4th century by Priscillian. It is derived from the Gnostic doctrines taught by Marcus, an Egyptian from Memphis. Priscillianism was later considered a heresy by both the Eastern Orthodox Church and the Roman Catholic Church.
Biblical inerrancy is the belief that the Bible "is without error or fault in all its teaching"; or, at least, that "Scripture in the original manuscripts does not affirm anything that is contrary to fact". Some equate inerrancy with biblical infallibility; others do not.
Cerinthus was an early Gnostic, who was prominent as a heresiarch in the view of the early Church Fathers. Contrary to the Church Fathers, he used the Gospel of Cerinthus, and denied that the Supreme God made the physical world. In Cerinthus' interpretation, the Christ descended upon Jesus at baptism and guided him in ministry and the performing of miracles, but left him at the crucifixion. Similarly to the Ebionites, he maintained that Jesus was not born of a virgin, but was a mere man, the biological son of Mary and Joseph.
The magisterium of the Catholic Church is the church's authority or office to give authentic interpretation of the word of God, "whether in its written form or in the form of Tradition". According to the 1992 Catechism of the Catholic Church, the task of interpretation is vested uniquely in the Pope and the bishops, though the concept has a complex history of development. Scripture and Tradition "make up a single sacred deposit of the Word of God, which is entrusted to the Church", and the magisterium is not independent of this, since "all that it proposes for belief as being divinely revealed is derived from this single deposit of faith".
The Catholic Church, also known as the Roman Catholic Church, is the largest Christian church, with 1.3 billion baptized Catholics worldwide as of 2019. It is among the world's oldest and largest international institutions, and has played a prominent role in the history and development of Western civilization. The church consists of 24 sui iuris churches, including the Latin Church and 23 Eastern Catholic Churches, which comprise almost 3,500 dioceses and eparchies located around the world. The pope, who is the bishop of Rome, is the chief pastor of the church. The bishopric of Rome, known as the Holy See, is the central governing authority of the church. The administrative body of the Holy See, the Roman Curia, has its principal offices in Vatican City, a small enclave of the Italian city of Rome, of which the pope is head of state.
In Christian theology, ecclesiology is the study of the Church, the origins of Christianity, its relationship to Jesus, its role in salvation, its polity, its discipline, its eschatology, and its leadership.
Semi-Pelagianism is a Christian theological and soteriological school of thought about the role of free will in salvation. In semipelagian thought, a distinction is made between the beginning of faith and the increase of faith. Semi-Pelagian thought teaches that the latter half – growing in faith – is the work of God, while the beginning of faith is an act of free will, with grace supervening only later. Semi-Pelagianism in its original form was developed as a compromise between Pelagianism and the teaching of Church Fathers such as Saint Augustine. Adherents to Pelagianism hold that people are born untainted by sin and do not need salvation unless they choose to sin, a belief which had been dismissed as heresy. In contrast, Augustine taught that people cannot come to God without the grace of God. Like pelagianism, semipelegianism was labeled heresy by the Western Church at the Second Council of Orange in 529.
Peter of Bruys was a medieval French religious teacher. He was called a heresiarch by the Roman Catholic Church because he opposed infant baptism, the erecting of churches and the veneration of crosses, the doctrine of transubstantiation and prayers for the dead. An angry Roman Catholic mob murdered him in or around 1131.
The history of the Calvinist–Arminian debate begins in early 17th century in the Netherlands with a Christian theological dispute between the followers of John Calvin and Jacobus Arminius, and continues today among some Protestants, particularly evangelicals. The debate centers around soteriology, or the study of salvation, and includes disputes about total depravity, predestination, and atonement. While the debate was given its Calvinist–Arminian form in the 17th century, issues central to the debate have been discussed in Christianity in some form since Augustine of Hippo's disputes with the Pelagians in the 5th century.
The Brethren of the Free Spirit were adherents of a loose set of beliefs deemed heretical by the Catholic Church but held by some Christians, especially in the Low Countries, Germany, France, Bohemia, and Northern Italy between the thirteenth and fifteenth centuries. The movement was first identified in the late thirteenth century. It was not a single movement or school of thought, and it caused great unease among Church leaders at the time. Adherents were also called Free Spirits.
Heresy in Christianity denotes the formal denial or doubt of a core doctrine of the Christian faith as defined by one or more of the Christian churches.
The doctrine of the Trinity, considered the core of Christian theology by Trinitarians, is the result of continuous exploration by the church of the biblical data, thrashed out in debate and treatises, eventually formulated at the First Council of Nicaea in AD 325 in a way they believe is consistent with the biblical witness, and further refined in later councils and writings. The most widely recognized Biblical foundations for the doctrine's formulation are in the Gospel of John, which possess ideas that originate in Platonism and Greek philosophy.
Heresy is any belief or theory that is strongly at variance with established beliefs or customs, particularly the accepted beliefs or religious law of a religious organization. A heretic is a proponent of heresy.
Gerard of Florennes, bishop of Cambrai as Gerard I, had formerly been chaplain to Henry II, Holy Roman Emperor, and helpful to the latter in his political negotiations with Robert the Pious, King of France. In 1024 Gerard called a synod in Arras to confront a purported heresy fomented by the Gundulfian heretics, who denied the efficacy of the Eucharist. The records of this synod, the Acta Synodi Atrebatensis, preserve a summary of orthodox Christian doctrine of the early eleventh century, as well contemporary peace-making practices. According to this text's author, the heretics were convinced by Gerard's explanation of orthodoxy, renounced their heresy, and were reconciled with the church.
Protestantism is a branch of Christianity that follows the theological tenets of the Protestant Reformation, a movement that began in the 16th century with the goal of reforming the Catholic Church from perceived errors, abuses, and discrepancies.
Proto-Protestantism, also called pre-Protestantism, refers to individuals and movements that propagated ideas similar to Protestantism before 1517, which historians usually regard as the starting year for the Reformation era. The relationship between medieval sects and Protestantism is an issue that has been debated by historians.