The Assisi Congress

From 18 to 22 September 1956, the liturgical movement reached the summit of its public, Rome-sanctioned phase. The First International Congress of Pastoral Liturgy convened at Assisi — in the shadow of St. Francis, beneath the dome of Santa Maria degli Angeli — and it was no fringe gathering of enthusiasts. Six cardinals, some eighty archbishops and bishops, and roughly 1,400 priests and laity came from across the Catholic world. It was presided over by Gaetano Cardinal Cicognani, Prefect of the Sacred Congregation of Rites, the very dicastery that governed the Church’s worship. The men who had spent half a century arguing for liturgical renewal now found themselves not merely tolerated but hosted under the highest auspices. On 22 September the Congress moved to Rome, and Pope Pius XII himself received the participants and addressed them. The movement had arrived.

The Movement at Its Zenith

The years immediately before Assisi had given the reformers real momentum. Pius XII had issued Mediator Dei in 1947, the first papal encyclical wholly devoted to the liturgy, which both blessed the movement’s aims and warned against its excesses. In 1955 he had promulgated Musicae Sacrae Disciplina on sacred music, and — most consequentially — a sweeping reform of the rites of Holy Week, the first major surgery on the Roman Missal in centuries. To the men assembling at Assisi, the lesson seemed plain: the liturgy could be reformed, and Rome itself would do the reforming.

The Congress proceedings, later published as The Assisi Papers, read like a roster of the movement’s leadership: Josef Jungmann, the great historian of the Roman Mass; the biblical scholar Augustine Cardinal Bea; pastoral theorists from the four great centers of liturgical effort — the German, the French, the Italian, and the Swiss. The mood was one of confidence and, as one contemporary report had it, of reformers congratulating themselves. Among the figures rising into prominence in the machinery of reform was a Vincentian priest, Father Annibale Bugnini, whose star was ascending through precisely the commissions and congresses that Assisi crowned. Within a few years he would become the central architect of the post-conciliar liturgical reform; at Assisi the trajectory was already visible.

Pius XII Blesses the Movement

When the participants reached Rome, the pope did not stint his praise. He opened, in French, by recalling that he had been asked to close their Congress, and he measured the movement’s progress against where it had stood thirty years before, finding the advance — in both extent and depth — undeniable. Then came the sentence the reformers would treasure: the liturgical movement, he said, had shown itself to be a sign of God’s providential designs for the present age, a passing of the Holy Spirit through His Church.

It is hard to overstate what those words meant to the men of the movement. The Vicar of Christ had publicly identified their cause with the action of the Holy Spirit. Half a century of patient labor — Beauduin’s parish program, the monastic centers of Maria Laach and Klosterneuburg, the dialogue Mass, the scholarship that had recovered the chant — was, in the pope’s own telling, a grace given to the Church for this hour. The Congress closed in something like triumph.

And Pius XII Draws the Limits

But the same address, read whole, is not a blank check. Having praised the movement, Pius XII immediately set its boundaries — and he set them in language no reformer could honestly ignore. The liturgy, he taught, contains elements that are immutable, a sacred content that transcends time, alongside elements that are variable and transitory. The distinction matters: not everything in the rite is open to revision, and the work of reform must know the difference.

He went further. Authority over the rites, he reminded them, is not the movement’s to claim: it belongs to the Popes to recognize the rites in force, to introduce new ones, and to regulate the order of worship. He warned against a creeping diminishment of reverence — against detaching the faithful’s attention from the principal action of the Mass, and against the tendency to esteem Christ’s presence in the tabernacle less, as though the sacrifice of the altar were enough and the Lord who accomplished it could recede from the center. And on the most contested question of all, he gave no inch: the Church, he said, has grave reasons for maintaining firmly in the Latin rite the unconditioned obligation of the celebrating priest to use the Latin language.

Whatever some at Assisi hoped to hear about a vernacular Mass, the pope did not grant it. He acknowledged the developments already conceded — limited vernacular in some rites, popular chant, new church architecture — but he reaffirmed Latin for the priest at the altar without qualification, and he reasserted that the regulation of worship is the prerogative of the Apostolic See, not of congresses or commissions.

The Distance Between 1956 and What Followed

Here is the quiet drama of Assisi. Within a dozen years, much of what Pius XII had ruled off-limits would be revisited: the Latin of the priest at the altar, the boundary of the immutable, the very scope of reform. Father Bugnini, prominent at Assisi, would chair the commission that drafted Sacrosanctum Concilium and then lead the Consilium that produced the Mass of 1969. None of this denies the validity or the liceity of the reformed rite, nor impugns the authority of the Council or of any pope — that floor is firm. But it does pose a historical question that this timeline cannot avoid: the movement that Pius XII blessed in 1956 he also fenced. The fences did not all hold.

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…a sign of the providential dispositions of God for the present time, as a passing of the Holy Spirit in His Church.

— Pope Pius XII at Assisi, 22 September 1956

Assisi 1956 was the movement’s brightest public moment under the patronage of Rome. Pius XII would die two years later. The Council that would carry the reform forward lay six years ahead. For one September week the liturgical movement stood in the sun of papal favor — encouraged, and cautioned, by the pope who knew both how much good it had done and how easily its instinct could be stretched past what he was willing to grant.