Mass (liturgy) — Western Christian celebration of the Eucharist

Structure and principal elements

Most forms of the Mass follow a broadly similar sequence: introductory rites, readings from Scripture, a homily, the Eucharistic prayer (which contains the consecration), the communion rite, and concluding rites. Common elements include a penitential act, a sung or spoken acclamation, the Lord’s Prayer, and prayers of thanksgiving. Musical settings, responses, and ritual gestures vary by tradition and local custom.

Typical components

• Introductory rites — greeting, penitential act, Kyrie, Gloria where appointed.
• Liturgy of the Word — readings, psalm, Gospel, homily.
• Eucharistic liturgy — offertory, Eucharistic prayer, consecration.
• Communion rite — Lord’s Prayer, breaking of the bread, communion, postcommunion prayer.
• Concluding rites — blessing and dismissal.

Theology of the presence

Different communities understand the result of the consecration in distinct theological terms. In Roman Catholic theology the doctrine traditionally called transubstantiation describes a change in the bread and wine; many Anglicans and Old Catholics speak of a real presence in ways that allow a range of formulations; some Protestant traditions emphasize a sacramental or commemorative understanding. All share the central belief that the Eucharistic celebration is a privileged encounter with Christ for the gathered community.

History and development

The ritual has roots in the meals and prayers of the early Christian communities and the Last Supper narrative. Over centuries Western rites became more elaborate and regionally distinct. Reform movements and councils sought both to standardize some forms and to allow pastoral adaptation; in the 20th century many churches introduced vernacular language, renewed liturgical texts, and increased lay participation while preserving core elements of the rite.

Denominational use and terminology

The designation "Mass" is used in Roman Catholic practice and by churches that share its western liturgical heritage, including some Old Catholic Churches and communities within the Anglo‑Catholic tradition of Anglicanism. Many Lutheran churches use the term as well (Lutheran) and in parts of northern Europe—particularly Scandinavian and Baltic countries—the local Lutheran Eucharistic service is commonly called the Mass. Eastern Christian communions typically use the term "Divine Liturgy" for their analogous rite.

Practice, music and vesture

Masses range from simple weekday celebrations to elaborate sung liturgies with chant, polyphony and incense. Ministers commonly include a presiding priest or bishop, deacons, and servers; specific vestments and ceremonial actions mark the solemnity of the occasion. Practices such as eucharistic reservation, adoration, and preparatory fasting vary by tradition and pastoral discipline.

Ecumenical and cultural significance

Beyond its sacramental role, the Mass structures the liturgical year, shapes communal identity, and has been a focus of ecumenical dialogue. Shared elements of the rite have supported common prayer and mutual recognition among some churches while doctrinal differences about the Eucharist remain important in interchurch relations.