Order of Mass is an outline of a Mass celebration, describing how and in what order liturgical texts and rituals are employed to constitute a Mass. The expression Order of Mass is particularly tied to the Roman Rite where the sections under that title in the Roman Missal also contain a set of liturgical texts that recur in most or in all Eucharistic liturgies, while the rubrics indicate the rituals, and the insertion points of the variable texts known as the proper of the Mass. Having been virtually unchanged for many centuries, the Roman Catholic Order of Mass changed decisively after the Second Vatican Council. Other Christian denominations have comparable descriptions of their liturgical practices for the Eucharist, which are however usually not called Order of Mass.
Sections of the Order of Mass
The Order of Mass in Western liturgy generally consists of the following sections: 1. Liturgy of the Word
The prayer said at the cleansing of the chalice, and the concluding prayers, which in the Tridentine Mass included the reading of what was called the Last Gospel as a farewell blessing.
The phrase Ite, missa est "Go, the mass is ended" is the final part of the Order of Mass. In the Tridentine Mass, it was followed by a private prayer that the priest said silently for himself, by the final blessing, and by the reading of the Last Gospel, and in some Masses it was replaced by Benedicamus Domino or Requiescant in pace. These phrases are sung to music given in the Missal, as is the choir's response, Deo gratias or Amen. In the Episcopal Church's Book of Common Prayer, the service ends with the celebrant saying, "Go in peace to love and serve the Lord." To which the congregation responds, "Thanks be to God."
The Kyrie eleison was traditionally sung in Greek, the others in Latin. Prior to the Council of Trent the Kyrie was frequently troped by adding texts particular to a specific feast day between the lines of the Kyrie; indeed English renaissance composers seem to have regarded the Sarum rite Kyrie as part of the propers and begin their mass settings with the Gloria. These tropes were essentially texts. Until the 1970 revision of the Roman Missal, the Agnus Dei was modified for Requiem Masses, and prayed not miserere nobis and dona nobis pacem, but dona eis requiem and dona eis requiem sempiternam. It was at one time popular to replace at a Solemn Mass the second half of the Sanctus with hymns such as the O Salutaris Hostia, or, at requiems, with a musical setting of the final invocation of the Dies Irae: "Pie Jesu Domine, dona eis requiem."
Proprium
The texts of the Order of Mass other than the Ordinarium parts can be grouped as follows:
The Tridentine-Mass Prayers at the Foot of the Altar or, post-1970, the Penitential Rite.
The prayers said in connection with the Scripture readings.
The Offertory prayers.
The Canon of the Mass, or Eucharistic Prayer, with its opening dialogue and its Preface, the latter of which, in spite of being variable, is included in the Order of Mass.
The Our Father and the following prayers, leading to the priest's communion, to which since 1970 is added the communion of the people, previously not part of the Order of Mass.
The prayer said at the cleansing of the chalice, and the concluding prayers, which in the Tridentine Mass included the reading of what was called the Last Gospel as a farewell blessing.
Within these six groupings, there are short phrases that in Tridentine Solemn Mass were sung by priest or deacon and by the choir. If sung in the post-Tridentine form of Mass, the response is usually given by the whole congregation.
Roman Rite
In the Roman Missal, the Order of Mass is printed as a distinct section placed in the middle of the book, between the Mass of the Easter Vigil and that of Easter Sunday in pre-1970 editions, and between the Proper of the Seasons and the Proper of the Saints thereafter. In a Catholic tradition Order of Mass is sometimes used as a synonym of Ordinary of the Mass, but the last expression usually rather refers to the Ordinarium parts of the Mass, i.e. the Mass ordinary, the set of texts of the Roman Rite Mass that are generally invariable. This contrasts with the proper, which are items of the Mass that change with the feast or following the Liturgical Year.
Pre-Tridentine Mass
Before the Roman Missal of 1570 the Order of Mass was less uniform but by 1000 AD many sections of the Tridentine Mass were already established as part of the Mass.
Tridentine Mass
The Order of Mass for the Tridentine Mass appears in Roman Missals from 1570, until it was replaced by the Order of Mass as published in the Roman Missal of 1970.
Mass of Paul VI
Many prayers have been shortened and/or alternative versions of texts of the ordinary can be chosen.
Other denominations
Much of the ordinary of the Eucharist is common to Western liturgical Christian denominations, but quite different from that of Eastern Christianity.
In the Byzantine Rite the Eucharist is called Divine Liturgy, which has several versions, with the Divine Liturgy of St. John Chrysostom coming closest to an equivalent of the Order of Mass in the Western traditions.
Traditionally, In Anglicanism the Book of Common Prayer is the guide for liturgical practices regarding the Eucharist, for instance having the Gloria near the end of the Service in some editions. However various revisions have taken place throughout the Anglican Communion during the 20th and 21st Century, with most provinces creating a liturgy with a close resemblance to the western tradition. For example, until the retranslation of the Roman Catholic English Order of the Mass, the Church of EnglandCommon Worship liturgy was almost identical to the Roman Catholic Ordo except for some differences in wording in the Eucharistic prayers, though with the substantive elements identical the notable difference being that the peace follows the intercessions, not the Eucharistic Prayer.
Lutheranism
's 1523 Formula missae and his 1526 Deutsche Messe form the base of the Order of Mass in Lutheran liturgical practice.
