From the Apostles to the Roman Missal
The Mass
The development of the Roman Mass from the Apostolic Church through the Roman Canon, the Council of Trent, the 1962 Missal, Vatican II, and the postconciliar Roman Missal — followed by a comparison of what changed.
From the Apostles to the Roman Missal
How the Roman Mass Took Shape
The Mass began in the earliest years of the Church, shortly after the death and Resurrection of Christ. The Roman liturgy did not appear all at once. Its essential Eucharistic pattern is visible in the earliest Christian sources; as the Church moved from persecuted communities into public worship, prayers and ceremonial became more settled; later centuries added, received, and regulated further elements; the Council of Trent was followed by a standardized printed Roman Missal; and the twentieth century brought a broad revision of the Roman liturgical books.
The purpose of this history is simply to establish the sequence and scale of development: what happened, why it happened, what changed, and what remained.
The Mass in the Apostolic Church
Within a couple of decades of the Crucifixion, St. Paul preserves the Eucharistic tradition he had “received” and “handed on” to the Corinthians. He recounts that, on the night he was betrayed, Jesus took bread, gave thanks, broke it, and said, “This is my body.” The Gospel accounts likewise preserve Christ’s words over the chalice: “This is my blood of the covenant.” Paul further teaches that the cup of blessing is a participation in the Blood of Christ and that the bread we break is a participation in the Body of Christ.22
Acts gives a glimpse of the worship of the first Christians after Pentecost: they devoted themselves to the teaching of the Apostles, fellowship, “the breaking of the bread”, and the prayers. There was no printed Roman Missal and no medieval ceremonial, but the essential realities were already present: apostolic teaching, communal prayer, the Eucharistic action, and the Sunday gathering of the Church.22
The Earliest Written Descriptions Look Familiar
The Didache, one of the earliest Christian writings outside the New Testament, speaks of Christians gathering on the Lord's Day, confessing their sins, breaking bread, giving thanks, and describing their worship in sacrificial language.24
Around the middle of the second century, St. Justin Martyr gives one of the clearest descriptions of Christian Sunday worship. The writings of the Apostles and Prophets are read; the presider instructs the people; all rise for prayer; bread, wine, and water are brought forward; the presider offers prayers and thanksgiving to the Father through the Son and Holy Spirit; the people answer Amen; Communion is distributed; and deacons carry the Eucharist to those who are absent. Justin also insists that Christians do not receive the Eucharist as ordinary bread and drink, but as the flesh and blood of Jesus Christ.23
From Persecution to Public Worship: the Roman Liturgy Takes Clearer Form
The fourth century changed the setting in which Christians worshiped. After imperial toleration and the end of the great persecutions, Christian communities could gather openly, congregations grew, and major churches and basilicas became regular places of worship. The Church did not invent a new Eucharist at this point; it brought an inherited Eucharistic tradition into a larger and more public setting.
There was still legitimate variation from place to place. The basic shape of Christian worship was recognizable, but not every local church used identical wording or ceremonial. Bishops exercised oversight of worship in their churches, and over these centuries prayers, readings, chants, the liturgical calendar, and ceremonial became more settled. Written liturgical collections also began to preserve material that had previously been transmitted more flexibly.32
Within the Roman Church, the Eucharistic Prayer became especially stable. Paul VI later wrote that the Roman Canon had taken on an “unchangeable form during the fourth and fifth centuries.”25 This was a gradual consolidation of an existing tradition rather than a single decree in the year 300.
St. Gregory the Great and the Consolidation of Roman Usage
By the pontificate of St. Gregory the Great, the Roman liturgy had reached a mature stage of development. Paul VI's account of the Roman Missal says that the prayers and general arrangement later inherited by the Latin Church went back, “in essence, to St. Gregory the Great.”25
Gregory's place in the story is therefore one of consolidation and regulation within an already existing Roman tradition. The centuries after him would continue to add and adapt prayers, chants, calendars, and ceremonial, but the Roman Eucharistic tradition had by then acquired a recognizable and durable form.
Development, Exchange, and the Growth of the Roman Mass
The Roman Mass continued to develop through the Middle Ages. Roman usage spread beyond Rome and interacted with other Western liturgical customs. The entrance rites became more elaborate; additional private prayers of the priest developed; the Offertory acquired fuller prayers; the Prayers at the Foot of the Altar became established; ceremonial gestures became more detailed; the calendar expanded; and the Last Gospel was among the later additions.
Liturgical books also became more complete and practical. Material once divided among separate books for the celebrant, readers, and singers was gradually gathered into fuller service books and eventually into the missal used by the priest. These developments did not happen everywhere at the same moment, and regional customs remained important for centuries.32
Pius XII later described the liturgy as containing divine elements that cannot be changed and human elements that can develop. He spoke of the Church as a “living organism” that grows, matures, develops, and adapts while safeguarding doctrine.26
The Council of Trent and a Standard Roman Missal
The Protestant Reformation brought major disputes over the Eucharistic Sacrifice, the priesthood, and the Real Presence. In 1562 the Council of Trent's Twenty-Second Session restated Catholic teaching on the Sacrifice of the Mass. In doing so, it referred to the Roman Canon as a prayer the Church had received and regulated over many centuries.27
Following the Council, Pope St. Pius V promulgated the Roman Missal of 1570. His constitution Quo Primum describes the work as a revision and re-editing of the Missal and preserved other legitimate Western uses that could demonstrate at least two hundred years of continuous custom.28
The importance of 1570 is therefore standardization: in an age of printing, doctrinal controversy, and substantial regional diversity, a corrected Roman Missal became the common norm for most of the Latin Church.
Revision Within a Stable Printed Tradition
The Roman Missal continued to be revised after 1570. Saints and feast days were added, rubrics were adjusted, St. Pius X made calendar and rubrical reforms, Pius XII substantially reformed Holy Week, and John XXIII made further revisions. During Vatican II, John XXIII also ordered the name of St. Joseph to be added to the Roman Canon.31
Across those centuries, the printed Missal was therefore neither completely static nor repeatedly rebuilt from the ground up. Its calendar and rubrics changed, while its fundamental Order of Mass and Roman Canon remained highly stable. Paul VI opened Missale Romanum by observing that the Missal promulgated by Pius V had served the Latin Church for four centuries and that its general arrangement went back in essence to Gregory the Great.25
The Liturgical Movement and the Desire for Renewal
During the nineteenth and twentieth centuries, the Liturgical Movement encouraged deeper study of the Church's worship, renewed attention to Gregorian chant and ancient sources, and greater understanding and participation by the faithful. Pius XII described this revival as having begun toward the end of the nineteenth century and acknowledged its many good fruits.26
Renewal was already producing practical reforms before Vatican II. Pius XII restored and restructured the Easter Vigil and Holy Week, and Paul VI later described those reforms as the first stage in the updating of the Roman Missal.25
Vatican II and the Principles of Liturgical Reform
The Second Vatican Council promulgated Sacrosanctum Concilium on December 4, 1963. The Council called for a reform of the liturgy so that the rites would express their meaning more clearly and foster the full, conscious, and active participation of the faithful. It also called for a broader presentation of Scripture, restoration of the Prayer of the Faithful, and wider use of vernacular languages.29
At the same time, the Council directed that Latin be preserved in the Latin rites and that Gregorian chant receive pride of place. It also established a general principle for reform: innovations should be introduced only when the good of the Church genuinely and certainly required them, and new forms should in some way grow organically from forms already existing.29
Implementing the Council's Reform
In January 1964, Paul VI established a special commission to implement the Constitution on the Sacred Liturgy. This body became known as the Consilium for the Implementation of the Constitution on the Sacred Liturgy.30
Over the following years, the reform became extensive. The Order of Mass was revised; the preparation of the gifts was reworked; the lectionary was greatly expanded; older elements were restored in some places; rites were simplified; additional options were introduced; and new Eucharistic Prayers were added alongside the Roman Canon.
Paul VI described the Eucharistic Prayer as the “major innovation” of the revised Missal. After noting the long stability of the Roman Canon, he announced the addition of three new Eucharistic Prayers.25
The Revised Roman Missal of Paul VI
Paul VI promulgated the revised Roman Missal with the apostolic constitution Missale Romanum on April 3, 1969, with its prescriptions taking effect later that year. The revised books came into widespread use in 1970 and formed the basis of the celebration commonly called the Novus Ordo or the current Roman Missal.25
The revision included new Eucharistic Prayers, simplification and reordering of rites, changes to the preparation of the gifts, restoration of certain earlier elements, a greatly expanded cycle of Scripture readings, and substantial revision of prayers and other parts of the Missal.25
Visual comparison and real celebrations
See the Liturgical Difference
Now that the historical development is clear, the illustration and real celebrations below help show how the inherited Roman rite, the current Roman Missal, and contemporary practice can differ in prayer, gesture, orientation, and ceremonial.
Traditional Latin Mass —1962 Missal
A Solemn High Mass at St. John Cantius Church. Watch especially the common orientation of priest and people, the silence of the Canon, the altar ceremonial, and the manner of Communion.
Novus Ordo Mass —Roman Canon / Eucharistic Prayer I
EWTN Corpus Christi Mass. This celebration is useful because it shows how traditional elements can exist within the current Roman Missal: Eucharistic Prayer I (the Roman Canon), a traditional sanctuary, reverent ceremonial, and an ad orientem celebration.10
Daily Novus Ordo —Eucharistic Prayer II
Daily TV Mass, 9 May 2026. This public daily Mass is included because the spoken text identifies Eucharistic Prayer II, the shorter approved Eucharistic Prayer that the General Instruction says is especially appropriate on weekdays.2021
Now compare the rites
What Changed?
The historical foundation is now in place. These focused study pages let the prayers, rubrics, gestures, and Church documents show exactly what was retained, what changed, what disappeared, and what remains optional or required in the current Roman Missal.
Read the Traditional Latin Mass and Novus Ordo prayers side by side, in the order of Mass.
Open the prayer comparison → Rubrics and gesturesMissal vs. PracticeCompare what Vatican II said, what the Novus Ordo actually prescribes or permits, and what may be encountered in contemporary practice.
Compare the rubrics → Required or optional?Is That in the Missal?Check common questions about changed words, Eucharistic Prayers, Communion, homilies, sacred silence, and other practices.
Check a practice → Primary documentationDocuments & SourcesRead the Church documents, early Christian sources, footnotes, and historical material behind the Mass history and comparisons.
View the sources →