Churches, beliefs, and history

Codex

Read about churches, the questions they disagree on, and the events that shaped Christian history.

Start with a church, a belief, or a date. Each article links to the statements and records behind it. A church's published teaching may differ from what an individual member believes.

Denominations

Denominations

Roman Catholic Church

The Catholic Church understands Christian life as communion with Christ through Scripture, apostolic tradition, the sacraments and a worldwide church united with the bishop of Rome. Its official teaching is more specific—and its worship more varied—than familiar arguments about “faith versus works” suggest.

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Denominations

Eastern Orthodox Churches

Eastern Orthodoxy is a communion of historic churches whose shared life centers on the Trinity, the resurrection, sacramental worship and the transformation of human beings through union with Christ. Greek, Russian, Antiochian and other Orthodox identities name church histories, not different gods or competing versions of Christianity.

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Denominations

Southern Baptist Convention

The Southern Baptist Convention is a voluntary cooperation of autonomous churches, not a hierarchy directing every local congregation. Its common convictions include the authority of Scripture, personal faith in Christ, believer’s baptism and a strong commitment to evangelism and missions.

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Denominations

United Methodist Church

United Methodism joins the Wesleyan emphasis on grace and personal holiness with a connectional church structure and a strong expectation of service to neighbors. Its approach to Christian growth is not simply “try harder”: it begins with God’s initiative and asks how that grace changes a life.

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Denominations

Assemblies of God (USA)

The Assemblies of God is a classical Pentecostal fellowship: evangelical in its teaching about Scripture and salvation, and distinctive in its expectation of baptism in the Holy Spirit, spiritual gifts, healing and Christ’s return. Its official teaching should not be confused with every claim made by a television preacher.

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Denominations

Lutheran Church—Missouri Synod

The LCMS is a confessional Lutheran church body. It places justification through faith in Christ at the center of its teaching while retaining a strongly sacramental understanding of Baptism and the Lord’s Supper. Those convictions make it different from both Roman Catholicism and many other Protestant traditions.

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Denominations

Presbyterian Church (U.S.A.)

The PC(USA) belongs to the Reformed tradition and organizes its life through shared councils of elders. Scripture, a collection of historic confessions, covenantal sacraments and a strong connection between worship and public responsibility all shape its identity.

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Denominations

Anglican Communion

A worldwide family of self-governing churches with roots in the English Reformation, held together by Scripture, common prayer, the historic creeds, sacraments and episcopal ministry.

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Denominations

Seventh-day Adventist Church

A Protestant Christian church known for seventh-day Sabbath observance, expectation of Christ’s return, whole-person ministry and a distinctive interpretation of biblical prophecy.

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Denominations

Church of God in Christ

A historically African American Holiness-Pentecostal denomination that joins conversion, sanctified living, Spirit-empowered witness and a strong communal church life.

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Denominations

Mennonite Church USA

An Anabaptist denomination that emphasizes following Jesus in daily life, believers’ baptism, congregational discernment, mutual care and active peacemaking.

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Denominations

Church of the Nazarene

A Wesleyan-Holiness church whose distinctive concern is that God’s grace not only forgives sin but forms people in wholehearted love for God and neighbor.

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Denominations

United Church of Christ

A united Protestant denomination with Congregational, Reformed, Evangelical and Christian roots, combining local church freedom with covenantal relationships, shared mission and historic Christian testimony.

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Denominations

Oriental Orthodox Churches

Oriental Orthodoxy includes the Coptic, Armenian, Syriac, Ethiopian, Eritrean and Indian Orthodox traditions. These ancient churches are neither Eastern Orthodox under another name nor churches that deny Christ’s humanity. Their common faith is expressed through distinctive liturgies, episcopal leadership and a deeply sacramental Christian life.

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Denominations

Evangelical Lutheran Church in America

A Lutheran denomination formed in 1988, centered on justification by grace through faith, the ministry of Word and sacrament, and service to neighbors through an interdependent church structure.

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Denominations

Presbyterian Church in America

An evangelical, Reformed Presbyterian denomination formed in 1973, subscribing to the Westminster Standards and governed through representative assemblies of elders.

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Belief Topics

Belief Topics

Reincarnation and Resurrection

Why Christian resurrection means the restoration of a person, not a succession of earthly lives, and where churches differ about death and the life to come.

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Belief Topics

Grace and Salvation

A guide to the language of grace, faith, justification, sanctification, and the disagreements that cannot be reduced to faith versus good behavior.

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Belief Topics

Spiritual Gifts and Tongues

What the New Testament says gifts are for, how churches interpret tongues and prophecy, and why discernment and ordinary service belong in the same conversation.

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Belief Topics

Sabbath and Sunday

Why Christians gather on different days, how Sabbath rest relates to Sunday worship, and what the disagreements mean in practice.

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Belief Topics

Peace and Discipleship

Christian approaches to enemy-love, nonviolence, legitimate defense, reconciliation, and the difficult work of protecting neighbors.

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Belief Topics

Jesus Christ: Divine and Human

An introduction to the incarnation, Christ’s full humanity and divinity, and the language churches use to protect both without turning Jesus into two persons.

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Belief Topics

Prayer and Christian Life

The biblical patterns of prayer, the place of written and spontaneous words, and the differences between asking God, trusting God, and trying to control an outcome.

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Christian History

Christian History

First-century Christian Communities

Christianity began within Jewish life under Roman rule. Its earliest communities were connected by traveling teachers, letters, shared worship, and difficult arguments about belonging.

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Christian History

Council of Nicaea (325)

The council called by Constantine in 325 rejected Arius’s account of the Son and established a decisive doctrinal boundary. The familiar creed used in worship also reflects the later council of 381.

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Christian History

East–West Division and 1054

The rupture between Eastern and Western churches developed over centuries. The confrontations of 1054 became a powerful symbol, but political violence, theological disagreement, and failed reunions also shaped the separation.

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Christian History

Reformation in the Sixteenth Century

The sixteenth-century Reformations reshaped Western Christianity through competing answers about salvation, Scripture, worship, and authority. Protestant movements differed from one another, while Catholic reform had its own roots and lasting institutions.

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Christian History

Council of Chalcedon (451)

Chalcedon’s definition confessed one Christ, fully divine and fully human. Its reception also produced a lasting division, and the churches that rejected it should not be confused with those that denied Christ’s humanity.

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Christian History

The Methodist Movement

Methodism grew from an eighteenth-century renewal movement into a worldwide family of churches. Its preaching, small groups, hymnody, and practical discipline connected conversion with a sustained life of holiness and service.

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Christian History

Azusa Street Revival (1906)

The Los Angeles revival associated with William J. Seymour became a major meeting place and communications hub for early Pentecostalism. Its importance includes interracial worship, women’s leadership, and a worldwide network—not a claim that all Pentecostal history began in one building.

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Christian History

Adventist Church Organized (1863)

The Seventh-day Adventist Church organized in 1863 after years of debate about cooperation and authority. Its roots lie in the Millerite movement and the aftermath of 1844, but those events are not the same as the denomination’s founding.

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Christian History

Council of Constantinople (381)

Constantinople strengthened the Nicene settlement and gave fuller expression to belief in the Holy Spirit. The creed associated with it became the familiar liturgical form, although its precise textual history requires care.

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Christian History

How the Biblical Canon Took Shape

The Christian Bible emerged through the reading, copying, circulation, and recognition of texts over centuries. Nicaea did not choose its books, and agreement on the New Testament did not eliminate differences over the Old Testament.

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Christian History

The Rise of Christian Monasticism

From desert communities to medieval monasteries, Christians developed distinctive forms of shared prayer, work, and renunciation. The story includes women, regional diversity, learning, reform, and persistent tensions over wealth and power.

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