First Lateran Council (1123)

The Investiture Controversy

Since the 11th century, the reforming popes had been fighting a practice that had become structural in the Empire: bishops and abbots often received their office through the intervention of the sovereign, who handed them the ring and the staff, the spiritual signs of their office. The problem was not merely protocol. Whoever chose and invested the bishops controlled the sees, the revenues, political loyalties and the administration of vast territories.^[5]

The so-called Gregorian reform answered three linked abuses: simony, that is the buying or selling of a sacred office; Nicolaitism, that is transgression of the clerical discipline of celibacy; and lay investiture, that is the seizure of the power of ecclesiastical appointment by princes. Lateran I received this heritage and fixed it in conciliar form.^[6]

The trauma between papacy and Empire

The crisis had culminated under Gregory VII and Henry IV, then continued under Urban II, Paschal II and Gelasius II. In 1111, Henry V had even extorted a concession from Paschal II under pressure after holding him prisoner; the pope later withdrew this compromise, judged impossible to maintain. When Calixtus II was elected in 1119, the Latin Church therefore needed not a mere truce, but a publicly received solution.^[7]

The council of 1123 intervened precisely as an act of reception. It did not create the Concordat of Worms, signed in 1122; it gave it a broader ecclesial foundation, before the bishops and abbots gathered in Rome.^[8]

St John Lateran, cathedral of Rome

The council met in the Lateran basilica, cathedral of the Bishop of Rome. This choice is significant. Before St Peter's Basilica became the most visible universal symbol of the papacy, the Lateran was the ordinary seat of Roman pontifical government and the natural venue of the great Roman synods.^[9]

The tradition reported by the Catholic Encyclopedia gives about 300 bishops and more than 600 abbots. Even if these figures must be read with caution, they show the nature of the event: Lateran I was not a local meeting, but a Western assembly of great breadth, called to manifest the unity recovered around the pope.^[10]

A very compressed chronology

Modern notices give the opening on 18 March 1123. The canons are dated 27 March 1123 in Denzinger; some traditions extend the liturgical or documentary closure to 6 April. The essential point is that the conciliar work proper was concentrated over a few days, because the political and canonical core had already been negotiated at Worms.^[11][12]

Calixtus II

Calixtus II, born Guy of Burgundy, was a pope particularly well placed to handle the conflict. He belonged to the high European aristocracy, knew the imperial balances of power and possessed the reforming authority needed to refuse a peace that would sacrifice the liberty of the Church. His pontificate was short, from 1119 to 1124, but it marked a major stage: the papacy emerged from frontal confrontation with the Empire without renouncing the principle of canonical election.^[13]

Henry V

Henry V, emperor of the Holy Roman Empire, was not present as a conciliar father, but his role is everywhere in the background. The Concordat of Worms rests on his renunciation of investiture by ring and staff, while retaining a place in the conferral of the temporal rights attached to the imperial bishoprics.^[14]

The Worms formula thus distinguishes two levels: the Church elects and confers spiritual authority; the sovereign recognises and grants the temporal regalia. The distinction seems technical, but it became a fundamental milestone in the institutional liberty of the medieval Church.^[15]

The reforming bishops and abbots

The assembly was also carried by the bishops, abbots and clerks who had lived through the crisis in the field. For them, the question of investiture was not a theoretical debate among jurists. It conditioned the possibility of reforming dioceses, removing simoniacal prelates, protecting ecclesiastical property, disciplining the clergy and limiting private violence.^[16]

The Concordat of Worms

The Concordat of Worms, concluded on 23 September 1122, is the key to understanding the council. In it Henry V renounced investiture by ring and staff and promised that elections of bishops and abbots would take place freely. The pope, for his part, accepted that elections would take place in the king's presence in the German kingdom, without simony or violence, and that the elect would receive temporal goods by the sceptre.^[17]

"I, Henry, by the grace of God august emperor of the Romans, restore to God, to the holy apostles Peter and Paul and to the holy Catholic Church all investiture by ring and staff." — Henry V, Concordat of Worms, 1122^[18]

This distinction does not yet correspond to a modern separation of Church and State. It does recognise, however, that sacramental and pastoral authority does not come from the prince. A bishop may have temporal responsibilities; he does not receive his episcopate from the emperor for all that.

The liberty of ecclesiastical elections

Lateran I took note of this solution and framed it with canons. Canonical election became the place where the Church juridically recovered possession of its liberty. The reform did not remove all political presence around important sees, but it forbade the ecclesiastical office being created, sold or distributed by the secular power like a civil post.^[19]

Simony condemned

The first canon strikes at the economic heart of ecclesiastical corruption: obtaining an ordination or a promotion in the Church by money. Denzinger summarises the canon under the heading "Simony, celibacy, investiture" and cites the decision to deprive of the dignity obtained anyone who acquired it in this way.^[20]

"We forbid in every way [...] that anyone be ordained or promoted in the Church of God for money." — Lateran I, canon 1, Denzinger §710^[21]

This canon belongs to a long series of reforming decisions. Lateran I did not discover simony; it treated it as a wound durable enough to have to be condemned again at ecumenical level.

Clerical discipline

The canon transmitted by Denzinger as number 3 forbids priests, deacons and subdeacons to keep under their roof concubines or wives, except for the women whom the old canon of Nicaea allowed on account of an unsuspected necessity: mother, sister, aunt or persons of like kind.^[22]

This canon must be read in the context of the Latin reform. It does not claim to settle the whole Eastern and Western history of clerical discipline; it imposes in the Latin Church a practical norm of domestic separation and clerical chastity, linked to the reforming ideal of the 11th–12th century.

Church property and the laity

Canon 4, in Denzinger's numbering, forbids laymen, even religious ones, to dispose of ecclesiastical goods. The text states that the bishop must administer the affairs of the Church "as under the gaze of God" and qualifies the lay appropriation of sacred goods as sacrilege.^[23]

This point directly rejoins the Investiture Controversy. Controlling a bishopric is not only appointing a pastor: it is often controlling lands, revenues and networks. Lateran I thus separates moral reform from patrimonial reform: purifying the Church also supposes tearing its property away from the logic of private possession.

A broader reform

The 22 canons also touch the truces of God, violence against pilgrims and travellers, counterfeiters, the crusades, irregular ordinations and several questions of discipline. The whole shows a council of pacification: after the juridical and political war between papacy and Empire, the Church wanted to restore a more stable Christian order.^[24]

A turning point, not a total victory

Lateran I marked a victory of principle: the emperor no longer confers spiritual authority by ring and staff. But it did not remove all tension between papacy, emperors, kings and local powers. Episcopal elections often remained influenced by families, chapters, sovereigns and territorial balances.^[25]

Its importance lies precisely in this realism. The council does not claim to abolish feudal society; it fixes a canonical boundary. The episcopate is not the prince's property. Church goods are not a private purse. The sacraments are not merchandise. Reform of the clergy is not optional.

The first great Latin ecumenical council

Lateran I also opens the series of great medieval Western councils: Lateran II, Lateran III, Lateran IV, then Lyons, Vienne, Constance, Florence and Trent. Compared with the ancient councils, the geographical and political centre shifts markedly towards Rome and the Latin West.^[26]

This shift does not erase the Christian East, but it reveals a new historical stage. After the schism of 1054 and the Byzantine crises, the ecumenical councils received by Rome henceforth took a more Western, more juridical and more disciplinary form.

The spiritual liberty of the Church

The central lesson of Lateran I remains the spiritual liberty of the Church. A Christian community cannot be reformed if its pastors are chosen as political rewards, bought with money or subjected first to an external power. The council affirms that the Church must be able to appoint its ministers according to its own rules, because their office touches the salvation of souls.^[27]

This liberty is not a corporate privilege. It protects the Christian people. If the bishop becomes an agent of the prince or a purchased proprietor, the poor, the faithful, the clerks and the monasteries immediately suffer the consequences.

A concrete reform rather than a slogan

Lateran I also shows that Catholic reform is never only a moral discourse. It passes through institutional decisions: juridical prohibitions, sanctions, rules of election, protection of property, discipline of morals and clarification of relations between civil power and spiritual authority.

This logic explains why the council remains useful today. It recalls that the holiness of the Church calls for saints, but also for structures that prevent money, coercion and political interests from deforming the pastoral mission.

• Read Constantinople IV: another council on the liberty of the Church against political pressures.
• Read Lateran II: the next reception of the Latin reform after the schism of Anacletus II.
• Read Lateran IV: the doctrinal and disciplinary summit of the medieval councils.
• Remember the heart of the matter: Lateran I turned the peace of Worms into a conciliar act of reform.