Second Lateran Council

Second Lateran Council
Name	Second Lateran Council
Council	Ecumenical council
Date	1139
Location	Rome
Convoked by	Pope Innocent II
Participants	Roman Catholic Church bishops, abbots, secular rulers
Previous	First Lateran Council (1123)
Next	Third Lateran Council

Second Lateran Council

The Second Lateran Council was an ecumenical assembly of the Roman Catholic Church held in 1139 in Rome under the authority of Pope Innocent II. It addressed crises arising from the Papal Schism of 1130–1138, clerical discipline, and the aftermath of the Investiture Controversy and the territorial conflicts among Normans, Holy Roman Empire, and Italian communes. The council issued canons reinforcing clerical celibacy, condemning simony, and seeking to restore papal authority amid competing claimants such as Antipope Anacletus II and secular magnates.

Background and Context

The council took shape after the resolution of the contest between Pope Innocent II and Anacletus II that fractured Western Christendom following the death of Pope Honorius II. The rivalry involved principal actors including the House of Welf, the House of Normandy, and the Hohenstaufen dynasty, with interventions by figures such as Roger II of Sicily and Lothair III, Holy Roman Emperor. The conflict overlapped with ongoing disputes derived from the Gregorian Reform movement and the earlier Investiture Controversy between papal reformers and imperial authorities like Henry V, Holy Roman Emperor. Ecclesiastical disorder, clerical marriage, and simoniacal practices persisted across dioceses from Canterbury to Milan and monastic centers such as Cluny and Monte Cassino, prompting Innocent to convene a general council to reassert canonical norms and consolidate recognition of his papacy.

Convening and Attendees

Pope Innocent II summoned prelates, abbots, and representatives from across Western Christendom to the Lateran Basilica complex in Rome, attracting bishops from provinces including Gaul, Brittany, Flanders, Spain, Portugal, Germany, and England. Notable attendees and supporters included cardinals aligned with Innocent, abbots from influential monasteries such as Cluny and Fountain, and secular allies like Lothair III who had earlier intervened on Innocent’s behalf. Representatives of major sees—Paris, Reims, Cologne, Milan, and Toledo—participated directly or sent legates, while deputies from emerging municipal authorities in Bologna and Florence observed the proceedings. Absent were proponents of the Anacletan obedience, though some clerics formerly aligned with Anacletus II sought reconciliation through submission to Innocent.

Canons and Decrees

The council promulgated a series of canons codifying measures on clerical morality, sacramental administration, and ecclesiastical jurisdiction. It reaffirmed and extended prohibitions on clerical marriage and concubinage, echoing reforms of the First Lateran Council (1123) and earlier synods influenced by the Gregorian Reform. Strong measures against simony targeted transactions in episcopal appointments and benefices, invoking precedents from councils at Rome and Clermont. Canons addressed liturgical uniformity and clerical attire, tightened rules on ordination and episcopal election procedures, and imposed penalties on secular interference in ecclesiastical elections—responding to patterns established in judgments involving Henry V, Holy Roman Emperor and decisions from the Council of Reims. The council also issued excommunications and anathematized supporters of Antipope Anacletus II, declaring their acts void and compelling restitution where possible.

Impact on Church Reform and Discipline

The Second Lateran Council reinforced the trajectory of papal-led reform by consolidating canonical standards first advanced during the Gregorian Reform and sustained at subsequent gatherings such as the First Lateran Council (1123) and regional synods. Its stringent anti-simony canons and reiteration of clerical celibacy bolstered papal claims to moral leadership over episcopal and monastic orders including Cistercians and Benedictines. By clarifying norms for ordination and curbing lay investiture practices still contested in relationships with rulers like Roger II of Sicily and Lothair III, the council contributed to the gradual disentangling of secular patronage from episcopal governance. Implementation varied, however, across dioceses such as Milan and Toledo, where local customs and powerful aristocratic families complicated uniform enforcement.

Political and Social Consequences

Politically, the council strengthened Pope Innocent II’s legitimacy after the papal schism, undermining the position of Anacletan partisans and consolidating alliances with Western monarchs and princes supportive of papal primacy. Its decisions influenced negotiations between the papacy and rulers including the Holy Roman Empire and the Norman kingdom of Sicily, affecting investiture, territorial claims, and ecclesiastical patronage. Socially, the enforcement of clerical celibacy and anti-simony measures affected parish life, monastic recruitment, and the distribution of benefices, reverberating through communities tied to cathedral chapters in Canterbury, Chartres, and Amiens. The council’s disciplinary agenda also intersected with communal aspirations in Italian city-states like Pisa and Genoa, where civic elites negotiated ecclesiastical privileges and obligations.

Legacy and Historical Assessment

Historians assess the Second Lateran Council as a decisive affirmation of papal reformist momentum in the 12th century that helped normalize clerical discipline and limit simony, even as enforcement remained uneven across regions from England to Iberia. It is viewed alongside the First Lateran Council (1123) and the later Third Lateran Council as part of a continuum shaping medieval ecclesiastical law and papal-imperial relations, informing canon law collections such as the works of Gratian and later decretists. Scholars link its political outcomes to shifting balances among dynasties like the Hohenstaufen and houses such as the Angevins, and to ecclesiastical developments in monastic reform movements including Cluny and the Cistercian Order. The council’s canons influenced subsequent synods and the long-term consolidation of clerical norms central to Latin Church identity.

Category:12th-century ecumenical councils