114 figures

Church figures

Heretics, defenders, and theologians who shaped Christian doctrine across two millennia.

Heretics(38)

Figures whose teachings were condemned as contrary to orthodox doctrine.

Arius

heretic

Presbyter in Alexandria

Nicene Era (4th C)

Pelagius

heretic

British monk and theologian active in Rome and North Africa

Post-Nicene Patristic (4th-5th C)

Nestorius

heretic

Archbishop of Constantinople

Post-Nicene Patristic (4th-5th C)

Valentinus

heretic

Gnostic teacher and theologian, active in Alexandria and Rome

Early Church (2nd-3rd C)

Aetius of Antioch

heretic

Deacon and radical Arian theologian in Antioch and Alexandria

Nicene Era (4th C)

Apollinaris of Laodicea

heretic

Bishop of Laodicea; friend of Athanasius and defender of Nicaea before his own condemnation

Nicene Era (4th C)

Basilides

heretic

Gnostic teacher in Alexandria, claimed to transmit secret teaching from the apostle Matthias

Early Church (2nd-3rd C)

Berengar of Tours

heretic

Archdeacon of Angers and teacher at Tours; the most prominent Eucharistic controversialist of the 11th century

Medieval (9th-15th C)

Bogomil

heretic

Bulgarian priest and founder of the Bogomil movement in the First Bulgarian Empire

Medieval (9th-15th C)

Carpocrates

heretic

Gnostic philosopher in Alexandria, founder of the Carpocratian sect

Early Church (2nd-3rd C)

Cerdon

heretic

Syrian Gnostic teacher in Rome, precursor and probable influence on Marcion

Early Church (2nd-3rd C)

Cerinthus

heretic

Jewish-Christian Gnostic teacher, active in Asia Minor; reportedly a contemporary and opponent of the Apostle John

Apostolic Fathers (1st-2nd C)

Donatus the Great

heretic

Bishop of Carthage and leader of the Donatist schism in North Africa

Nicene Era (4th C)

Emperor Constantine V

heretic

Byzantine Emperor; the most aggressive and theologically active of the iconoclast emperors

Late Patristic (5th-8th C)

Emperor Leo III

heretic

Byzantine Emperor; initiator of the first phase of Byzantine Iconoclasm

Late Patristic (5th-8th C)

Eunomius of Cyzicus

heretic

Bishop of Cyzicus; leader of the radical Arian (Anomoean) party; the most philosophically sophisticated Arian theologian

Nicene Era (4th C)

Eutyches

heretic

Archimandrite (monastic superior) in Constantinople; opposed Nestorianism so strongly he fell into the opposite error

Post-Nicene Patristic (4th-5th C)

Felix of Urgel

heretic

Bishop of Urgel in the Spanish March; leading proponent of Spanish Adoptionism under Carolingian rule

Medieval (9th-15th C)

Girolamo Savonarola

heretic

Dominican friar and prophet in Florence; de facto ruler of the Florentine Republic 1494-1498

Reformation (15th-16th C)

Guilhabert de Castres

heretic

Bishop of Toulouse and leading Cathar perfectus in Languedoc; presided over the great Cathar council at Saint-Félix in 1167

Medieval (9th-15th C)

Hermogenes of Carthage

heretic

Painter and theologian in Carthage; opponent of Tertullian

Early Church (2nd-3rd C)

Jan Hus

heretic

Rector of the University of Prague; Czech reformer and preacher; burned at the Council of Constance

Medieval (9th-15th C)

John Wycliffe

heretic

English philosopher and theologian at Oxford; the first major pre-Reformation reformer; translator of the Bible into English

Medieval (9th-15th C)

Jovinian

heretic

Roman monk; opponent of ascetic elitism in the Western church

Post-Nicene Patristic (4th-5th C)

Lucifer of Cagliari

heretic

Bishop of Cagliari in Sardinia; extreme rigorist who refused any reconciliation with bishops who had compromised with Arianism

Nicene Era (4th C)

Macedonius I

heretic

Bishop of Constantinople; leader of the Semi-Arian Pneumatomachian party

Nicene Era (4th C)

Mani

heretic

Persian prophet and founder of Manichaeism; presented himself as the final messenger of God completing the work of Buddha, Zoroaster, and Jesus

Early Church (2nd-3rd C)

Marcellus of Ancyra

heretic

Bishop of Ancyra; initially an ally of Athanasius against Arianism who was himself condemned for the opposite error

Nicene Era (4th C)

Marcion of Sinope

heretic

Ship-owner and theologian from Sinope in Pontus; founded the first large-scale alternative Christian church with his own canon of scripture

Early Church (2nd-3rd C)

Meletius of Lycopolis

heretic

Bishop of Lycopolis in Egypt; rigorist schismatic whose followers clashed with Athanasius for decades

Nicene Era (4th C)

Montanus

heretic

Founder of the Montanist movement (New Prophecy) in Phrygia, Asia Minor

Early Church (2nd-3rd C)

Novatian

heretic

Roman presbyter and theologian; first significant Latin theologian; rival bishop of Rome after Cornelius

Early Church (2nd-3rd C)

Paul of Samosata

heretic

Bishop of Antioch and high official ('ducenarius') in the court of Queen Zenobia of Palmyra

Early Church (2nd-3rd C)

Peter Waldo

heretic

Merchant of Lyon; founder of the Waldensian movement; translated the Bible into vernacular French

Medieval (9th-15th C)

Priscillian

heretic

Bishop of Ávila in Spain; first Christian heretic executed by a Christian emperor

Post-Nicene Patristic (4th-5th C)

Sabellius

heretic

Theologian in Rome; the most systematic early proponent of Modalist Monarchianism

Early Church (2nd-3rd C)

Simon Magus

heretic

Samaritan magician and religious teacher; the original 'simoniast'; regarded by church fathers as the father of all heresies

Apostolic (1st C)

Theodotus of Byzantium

heretic

Leather merchant from Byzantium; founder of Dynamic Monarchianism (Adoptionism) in Rome

Early Church (2nd-3rd C)

Defenders(8)

Bishops and scholars who championed orthodox teaching against heterodox challenges.

Theologians(68)

Influential thinkers whose ideas shaped the development of Christian thought.

Augustine

theologian

Bishop of Hippo; the most influential theologian in Western Christianity

Post-Nicene Patristic (4th-5th C)

Alphonsus Liguori

theologian

Italian bishop, founder of the Redemptorists, Doctor of the Church; patron saint of moral theologians

Modern (17th C+)

Ambrose of Milan

theologian

Bishop of Milan; mentor of Augustine; the first church leader to successfully assert episcopal authority over an emperor

Post-Nicene Patristic (4th-5th C)

Anselm of Canterbury

theologian

Archbishop of Canterbury; founder of Scholastic theology; 'the father of Scholasticism'

Medieval (9th-15th C)

Basil of Caesarea

theologian

Archbishop of Caesarea in Cappadocia; one of the three Cappadocian Fathers; a founder of Eastern monasticism

Nicene Era (4th C)

Bede the Venerable

theologian

Benedictine monk at Wearmouth-Jarrow in Northumbria; the greatest scholar of the early medieval West; Doctor of the Church

Late Patristic (5th-8th C)

Bernard of Clairvaux

theologian

Cistercian abbot of Clairvaux; the most influential churchman in 12th-century Europe; Doctor of the Church

Medieval (9th-15th C)

Blaise Pascal

theologian

French mathematician, physicist, and Christian apologist; Jansenist layman; the most brilliant mind to engage seriously with 17th-century skepticism

Modern (17th C+)

Boethius

theologian

Roman senator, philosopher, and theologian under Theodoric the Great; wrote the Consolation of Philosophy while awaiting execution on false treason charges

Late Patristic (5th-8th C)

Bonaventure

theologian

Franciscan friar, Minister General of the Franciscan Order, Cardinal Bishop of Albano; Doctor of the Church; a leading theologian at the University of Paris

Medieval (9th-15th C)

C.S. Lewis

theologian

Oxford and Cambridge literature scholar; Anglican lay theologian; the most widely read Christian apologist of the 20th century

Modern (17th C+)

Cassiodorus

theologian

Roman senator and later monk; founder of the Vivarium monastery; saved classical and Christian learning through systematic manuscript copying

Late Patristic (5th-8th C)

Charles Spurgeon

theologian

Baptist pastor at the Metropolitan Tabernacle in London; the most popular preacher in 19th-century England; 'the Prince of Preachers'

Modern (17th C+)

Charles Wesley

theologian

Anglican clergyman; co-founder of Methodism with his brother John; the most prolific hymn writer in Christian history

Modern (17th C+)

Clement of Alexandria

theologian

Head of the Catechetical School of Alexandria; the first major Christian theologian to engage systematically with Greek philosophy

Early Church (2nd-3rd C)

Cyril of Jerusalem

theologian

Bishop of Jerusalem; exiled three times under Arian emperors; his Catechetical Lectures are the most complete 4th-century guide to Christian initiation

Nicene Era (4th C)

Dietrich Bonhoeffer

theologian

German Lutheran pastor and theologian; leader of the Confessing Church; executed by the Nazis for participation in the plot against Hitler

Modern (17th C+)

Diodore of Tarsus

theologian

Bishop of Tarsus; founder of the Antiochene School of biblical interpretation; teacher of John Chrysostom and Theodore of Mopsuestia

Nicene Era (4th C)

Dominic de Guzman

theologian

Spanish priest; founder of the Order of Preachers (Dominicans); preached against Catharism in Languedoc

Medieval (9th-15th C)

Duns Scotus

theologian

Franciscan friar and philosopher-theologian at Oxford, Paris, and Cologne; 'the Subtle Doctor'; founder of Scotism

Medieval (9th-15th C)

Ephrem the Syrian

theologian

Deacon and theologian in Nisibis and Edessa; the greatest Syriac Christian writer; Doctor of the Church

Nicene Era (4th C)

Erasmus of Rotterdam

theologian

Dutch humanist scholar and Catholic priest; the most celebrated intellectual in Europe in the early 16th century; produced the first printed Greek New Testament

Reformation (15th-16th C)

Francis de Sales

theologian

Bishop of Geneva; co-founder (with Jane de Chantal) of the Order of the Visitation; Doctor of the Church; patron saint of writers and the deaf

Modern (17th C+)

G.K. Chesterton

theologian

English journalist, novelist, poet, and Catholic apologist; converted from Anglicanism to Catholicism in 1922

Modern (17th C+)

George Fox

theologian

English itinerant preacher; founder of the Religious Society of Friends (Quakers)

Modern (17th C+)

George Whitefield

theologian

Anglican evangelist; the leading preacher of the Great Awakening in Britain and America; Calvinist Methodist

Modern (17th C+)

Gregory I the Great

theologian

Pope of Rome; the most influential pope of the patristic era; Doctor of the Church; shaped medieval Western Christianity more than any figure after Augustine

Late Patristic (5th-8th C)

Gregory Palamas

theologian

Archbishop of Thessaloniki; the principal theologian of Hesychasm; the defining figure of late Byzantine Orthodox theology

Medieval (9th-15th C)

Gregory of Nazianzus

theologian

Archbishop of Constantinople; one of the three Cappadocian Fathers; 'Gregory the Theologian'; his orations defined Trinitarian and Christological orthodoxy

Nicene Era (4th C)

Gregory of Nyssa

theologian

Bishop of Nyssa; one of the three Cappadocian Fathers; the most philosophically sophisticated of the Cappadocians; sometimes called the 'father of Christian mysticism'

Nicene Era (4th C)

Hildegard of Bingen

theologian

Benedictine abbess in the Rhineland; visionary, theologian, composer, physician, and preacher; Doctor of the Church

Medieval (9th-15th C)

Hippolytus of Rome

theologian

Presbyter in Rome; the first antipope; the most prolific early Christian writer in Greek; martyr

Early Church (2nd-3rd C)

Ignatius of Antioch

theologian

Bishop of Antioch; the second or third bishop after Peter; martyr; wrote seven letters en route to his execution in Rome

Apostolic Fathers (1st-2nd C)

Ignatius of Loyola

theologian

Spanish soldier turned mystic; founder of the Society of Jesus (Jesuits); the central figure of the Catholic Counter-Reformation

Reformation (15th-16th C)

Isidore of Seville

theologian

Archbishop of Seville; the last of the Latin Church Fathers; his Etymologiae became the standard reference work of the Middle Ages

Late Patristic (5th-8th C)

Jerome

theologian

Priest and biblical scholar; translator of the Latin Vulgate Bible; the most learned biblical scholar of the patristic era; Doctor of the Church

Post-Nicene Patristic (4th-5th C)

Joachim of Fiore

theologian

Calabrian abbot and visionary; Cistercian and later founder of his own order; his prophetic reading of history influenced nearly every subsequent reform movement

Medieval (9th-15th C)

John Bunyan

theologian

English Nonconformist minister; imprisoned 12 years for unlicensed preaching; author of the most widely read work of Protestant devotional literature

Modern (17th C+)

John Calvin

theologian

French lawyer turned reformer; pastor and theologian in Geneva; the most systematic theologian of the Protestant Reformation

Reformation (15th-16th C)

John Cassian

theologian

Monk, priest, and monastic founder in Gaul; brought Eastern desert monasticism to the Western church; founder of Saint-Victor monastery in Marseille

Post-Nicene Patristic (4th-5th C)

John Chrysostom

theologian

Archbishop of Constantinople; the greatest preacher of the early church; 'golden-mouthed'; Doctor of the Church

Post-Nicene Patristic (4th-5th C)

John Knox

theologian

Scottish reformer; galley slave; minister in Geneva under Calvin; founder of the Scottish Presbyterian church

Reformation (15th-16th C)

John Wesley

theologian

Anglican clergyman; founder of Methodism; the most important evangelist in 18th-century Britain

Modern (17th C+)

John of the Cross

theologian

Spanish Carmelite friar and mystic; co-reformer of the Carmelite order with Teresa of Ávila; Doctor of the Church

Reformation (15th-16th C)

Jonathan Edwards

theologian

Congregational minister in Northampton, Massachusetts; the greatest theologian in American history; a central figure in the Great Awakening

Modern (17th C+)

Justin Martyr

theologian

Philosopher turned Christian apologist; the first major Christian intellectual to engage Greco-Roman philosophy; martyred in Rome under Marcus Aurelius

Early Church (2nd-3rd C)

Karl Barth

theologian

Swiss Reformed theologian; the most important Protestant theologian of the 20th century; leader of the Confessing Church in Germany

Modern (17th C+)

Martin Luther

theologian

German Augustinian friar and professor of theology at Wittenberg; initiator of the Protestant Reformation

Reformation (15th-16th C)

Maximus the Confessor

theologian

Monk and theologian in North Africa and Rome; the greatest Eastern theologian of the 7th century; died in exile after having his tongue and hand cut off for opposing Monothelitism

Late Patristic (5th-8th C)

Meister Eckhart

theologian

Dominican friar and theologian; master of theology at Paris; vicar-general of Bohemia; the greatest German mystic

Medieval (9th-15th C)

Nicholas of Cusa

theologian

Cardinal, bishop, and philosopher-theologian; one of the greatest minds of the 15th century; a transitional figure between medieval and Renaissance thought

Medieval (9th-15th C)

Origen

theologian

Head of the Catechetical School of Alexandria; the most prolific and wide-ranging theologian of the early church; condemned posthumously

Early Church (2nd-3rd C)

Paul of Tarsus

theologian

Apostle to the Gentiles; author of 13 New Testament letters; the most theologically influential figure in Christian history after Jesus

Apostolic (1st C)

Peter Abelard

theologian

French philosopher and theologian at Paris; the most controversial academic theologian of the 12th century; lover of Héloïse

Medieval (9th-15th C)

Peter Chrysologus

theologian

Archbishop of Ravenna; Doctor of the Church; known for brief, clear sermons on the incarnation and Christian life

Post-Nicene Patristic (4th-5th C)

Philip Melanchthon

theologian

German humanist and theologian; Luther's closest collaborator; author of the Augsburg Confession; the systematizer of Lutheran theology

Reformation (15th-16th C)

Photius of Constantinople

theologian

Patriarch of Constantinople; the central figure of the Photian Schism; the most learned man of the 9th century

Medieval (9th-15th C)

Prosper of Aquitaine

theologian

Lay theologian in Gaul; the most important defender of Augustine's doctrine of grace after Augustine's death; later secretary to Pope Leo I

Post-Nicene Patristic (4th-5th C)

Pseudo-Dionysius the Areopagite

theologian

Anonymous Syrian Christian author writing under the name of Paul's Athenian convert (Acts 17:34); the foundational figure of Christian negative (apophatic) theology

Late Patristic (5th-8th C)

Reinhold Niebuhr

theologian

American Protestant theologian and public intellectual; the most influential American theologian of the 20th century

Modern (17th C+)

Robert Bellarmine

theologian

Italian Jesuit cardinal; the foremost Catholic polemicist against Protestantism; Doctor of the Church

Reformation (15th-16th C)

Tertullian

theologian

North African lawyer and theologian; the father of Latin Christian theology; coined the words 'Trinity', 'person', and 'substance' in their theological sense

Early Church (2nd-3rd C)

Theodore of Studion

theologian

Abbot of the Stoudios monastery in Constantinople; the principal monastic reformer of Byzantine Christianity; an ally of Patriarch Nikephoros in defending icons

Late Patristic (5th-8th C)

Thomas Aquinas

theologian

Dominican friar and professor of theology at Paris and Naples; Doctor of the Church; 'the Angelic Doctor'; the most systematic theologian in Christian history

Medieval (9th-15th C)

Thomas a Kempis

theologian

Augustinian canon in the Netherlands; author of the most widely read Christian devotional work after the Bible

Medieval (9th-15th C)

Ulrich Zwingli

theologian

Swiss reformer in Zürich; the third founder of the Protestant Reformation alongside Luther and Calvin; died in battle

Reformation (15th-16th C)

William Tyndale

theologian

English reformer, linguist, and Bible translator; martyred by strangulation and burning for heresy in the Netherlands

Reformation (15th-16th C)

William of Ockham

theologian

Franciscan friar and philosopher-theologian at Oxford and Munich; 'the Venerable Inceptor'; founder of Nominalism

Medieval (9th-15th C)