Second Lateran Council

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“Careful to keep the unity of the Spirit in the bond of peace.”

Ephesians 4:3, Douay-Rheims

What You Will Learn

Why Lateran II was called and which crisis it addressed.
What the council taught, decided, or reformed.
How to distinguish lasting doctrine from historically conditioned discipline.
Why the council still matters for Catholic faith and life.

The Catholic Answer in Brief

The Second Lateran Council met after the schism caused by the rival claimant Anacletus II. Pope Innocent II convoked the council to restore unity, address ordinations and appointments made during the schism, condemn doctrinal errors, and renew ecclesiastical discipline.

Council at a Glance

Place: the Lateran Basilica in Rome.
Year: AD 1139.
Pope: Innocent II.
Principal setting: the schism of Anacletus II.
Character: reconciliation, discipline, and condemnation of errors.

Historical Setting

After the death of Pope Honorius II, competing elections produced Innocent II and Anacletus II. The division lasted until Anacletus’s death in AD 1138. The council sought to remove the remaining effects of the schism and establish a common canonical order.

What the Council Taught and Decided

After the Schism

The council invalidated or penalized offices and ordinations associated with the schismatic obedience, though the exact pastoral consequences were shaped by subsequent canonical practice.

Doctrine and Discipline

It condemned errors associated with movements such as the Petrobrusians and Henricians and renewed laws against simony, clerical marriage, violence against clerics, and abuses of ecclesiastical office.

Peace and Public Order

Several canons attempted to restrain violence and regulate practices judged harmful to Christian society.

Authority, Reception, and Limits

Many of the council’s canons repeat or strengthen earlier reform legislation. Their historical wording should be read within medieval legal circumstances. The enduring doctrinal or moral principle must be distinguished from a penalty or legal mechanism that may later be altered.

An ecumenical council’s authority must be read according to the subject and form of each act. Dogmatic definitions, authoritative doctrinal judgments, moral principles, disciplinary canons, juridical penalties, and prudential political decisions do not all possess the same permanence or theological weight.

Common Misconceptions

The Council Was Not Merely a Punitive Assembly

Its goal was restoration of communion and reform after a serious schism.

Not Every Medieval Penalty Remains Current Canon Law

Ecclesiastical discipline can change while doctrine remains stable.

Large Attendance Figures Are Approximate

Medieval reports should not be treated as modern registration records.

Why Lateran II Matters

Lateran II shows the damage caused by schism and the need for lawful succession, reconciliation, and disciplined reform. Unity is not maintained by sentiment alone; it requires visible communion and just ecclesiastical order.

Key Truths

Lateran II is the tenth ecumenical council.
It met in AD 1139 under Pope Innocent II.
It addressed the aftermath of the Anacletan schism.
It condemned errors and renewed Church discipline.
Its legal canons must be read in historical context.

Reflection Questions

Which doctrinal or pastoral problem required the Church to speak more precisely?
What part of this council’s teaching is permanent doctrine, and what part belongs to changeable discipline?
How does this council deepen my understanding of Christ, the Church, or Christian unity?
What error or oversimplification should I now avoid?

Prayer

Lord Jesus Christ, You promised to remain with Your Church and to send the Holy Spirit to guide her in truth.

Grant me humility to receive the faith faithfully, wisdom to distinguish doctrine from discipline, and charity when studying the conflicts and wounds of Christian history. May the teaching of Lateran II draw me closer to You and strengthen my communion with Your Church. Amen.

Selected Sources and Further Reading

Source note: This CatholicG33k page is a concise theological and historical guide. It intentionally summarizes rather than duplicates the full Catholic Encyclopedia article or the complete conciliar acts. External source documents open in a new browser tab.