Lutheran Christianity is a church family rather than a single denomination. Its shared name points to Martin Luther. Lutherans understand their faith as rooted in Jesus and the Scriptures that Luther sought to explain.
Where it came from
In sixteenth-century Germany, Luther, a Catholic friar and teacher, challenged practices and teachings he believed obscured the Christian message. The disputes became part of the Protestant Reformation, producing churches separate from Rome. Lutheran communities took root across Europe and later worldwide through migration, mission, and local leadership.
The Augsburg Confession and other writings gathered in the Book of Concord set out the tradition's teaching. A confession in this context is a public statement of faith. Luther's Small Catechism is a short teaching book explaining basic Christian beliefs and practices.
What it emphasizes
At its heart is justification by grace through faith: being put right with God is God's gift through Jesus, received in trust rather than earned by moral achievement. This does not make care for others unnecessary. Lutherans understand service to others as a response to God's freely given grace.
Preaching, baptism, and Communion are central ways God gives and sustains faith. Lutheran churches baptize infants as well as older believers. They teach that Christ's body and blood are truly present in Communion, rather than treating the meal as remembrance alone. Their explanation differs from the Catholic doctrine of transubstantiation, which holds that bread and wine become Christ’s body and blood while their appearances remain. See Salvation and works, Baptism, and Communion.
Worship and organization
Many services follow an inherited pattern of Scripture readings, prayers, hymns, preaching, and Communion. Music and education have important roles. Contemporary worship also exists, and local cultures shape the experience.
Organization varies: some churches have bishops, while others emphasize congregations and synods, assemblies through which churches work together. The Lutheran World Federation connects many Lutheran churches, but does not include every Lutheran body.
Differences within the family
Lutherans disagree about how binding their confessional writings are, how to interpret biblical authority, and how much agreement is needed for churches to share Communion. Some ordain women; others reserve the pastoral office for men. For example, the Evangelical Lutheran Church in America and the Lutheran Church–Missouri Synod have significant differences, despite sharing a Lutheran inheritance.
These disagreements concern interpretation and church practice; one congregation's position cannot stand for the whole family. Compare Biblical authority and Women and ministry.
Sources & further reading
A question in the margin is a good place to begin.