The
Ecclesiastical Latin phrase
ad orientem is commonly used today to describe a particular posture of a priest in
Christian liturgy: facing away from the people towards the
apse or
reredos or wall behind the altar, with priest and people looking in the same direction, as opposed to the
versus populum orientation in which the priest faces the congregation. In this use, the phrase is not necessarily related to the geographical direction in which the priest is looking and is employed even if he is not facing to the east or even has his back to the east. In the
Tridentine Roman Missal published in 1570, however,
ad orientem and
versus populum are not mutually exclusive. The altar may indeed be
versus populum (facing the people), but even in this case it is assumed to be
ad orientem (towards the East): "
Si altare sit ad orientem, versus populum, celebrans versa facie ad populum, non vertit humeros ad altare, cum dicturus est Dóminus vobiscum, Oráte, fratres, Ite, missa est
, vel daturus benedictionem ..." (If the altar is
ad orientem, towards the people, the celebrant, facing the people, does not turn his back to the altar when about to say
Dominus vobiscum ["The Lord be with you"],
Orate, fratres [the introduction to the prayer over the offerings of bread and wine], and
Ite, missa est [the dismissal at the conclusion of the Mass], or about to give the blessing ...). The wording remained unchanged in all later editions of the Tridentine Missal, even the last, which is still in use today.
History of Rome, at which popes have always celebrated
Mass facing east and also facing the people Most early churches were built with their apse facing the east, with the exceptions mainly occurring in Rome and North Africa after the legalization of Christianity; the orientation of buildings in Rome used for Christian liturgy before the end of persecution is not known. The earliest churches in Rome had a façade to the east and an apse with the altar to the west; the priest celebrating Mass stood behind the altar, facing east and so towards the people. According to
Louis Bouyer, not only the priest but also the congregation faced east at prayer. Michel Remery critiques Bouyer's view on the grounds of the unlikelihood that, in those churches where the altar was to the west, Christians would turn their backs on the altar (and the priest) at the celebration of the Eucharist. According to Remery, the view prevails that the priest, facing east, would celebrate
ad populum in some churches, in others not, in accordance with the churches' architecture. The official journal of the
Congregation for Divine Worship and the Discipline of the Sacraments Notitiae also commented in its May 1993 issue on the unlikelihood that the people would turn their backs on the altar so as to face east; and it recalled the reproaches of
Pope Leo I against those who on entering
Saint Peter's Basilica would turn round to face the rising sun and bow their heads to it. Lang and Gamber argue that in churches with a westward apse, the people did not face either towards or away from the altar, but rather stood in the side aisles facing the opposite side aisle, which allowed them to see both the altar and the East. The central aisle would have been left empty for processions. This thesis is supported by indications that early Christians conventionally prayed both eastward and towards open doors or windows, and churches were segregated with women on one side and men on the other. Outside of Rome, it was an ancient custom for most churches to be built with the entrance at the west end and for priest and people to face eastward to the place of the rising sun. Among the exceptions was the original
Constantinian Church of the Holy Sepulchre in
Jerusalem, which had the altar in the west end. After the
Edict of Milan legitimized the building of Christian churches, the practice of praying towards the east did not result in uniformity in their
orientation. By the reign of Emperor
Justinian, churches in the Eastern Roman Empire were consistently oriented with the apse on the eastern side, and under his rule, North African churches were also remodeled to have the apse on the eastern side. In 386, the Theodosian Basilica of St. Paul was built in Rome with the apse on the eastern side, which later became common practice. In the 8th or 9th century, the position whereby the priest faced the apse, not the people, when celebrating Mass was increasingly adopted in the Roman rite. The Ordo Romanus I, dating to the early 700s, mentions the Pope turning to face the people to intone the Gloria and then immediately turning back to face east, implying that the rubric was written for a church with an eastward apse. Some new churches in Francia such as St. Gall, influenced by Roman basilicas, also adopted the westward-facing apse, although this tendency was shortlived. However, the
Tridentine Roman Missal continued to recognize the possibility of celebrating Mass "
versus populum" (facing the people), and in several churches in Rome, it was physically impossible, even before the twentieth-century liturgical reforms, for the priest to celebrate Mass facing away from the people because of the presence, immediately in front of the altar, of the "confession" (), an area sunk below floor level to enable people to come close to the tomb of the saint buried beneath the altar. Anglican Bishop
Colin Buchanan argues that there "is reason to think that in the first millennium of the church in Western Europe, the president of the eucharist regularly faced across the eucharistic table toward the ecclesiastical west. Somewhere between the 10th and 12th centuries, a change occurred in which the table itself was moved to be fixed against the east wall, and the president stood before it, facing east, with his back to the people." This change, according to Buchanan, "was possibly precipitated by the coming of tabernacles for reservation, which were ideally both to occupy a central position and also to be fixed to the east wall without the president turning his back to them." However, various surveys of old English churches found no evidence of any such general practice.
Roman Catholic liturgy Low Mass celebrated
ad orientem (not necessarily in the geographical sense) in 2009 The present Roman Missal of the Catholic Church (revised in 1969 following the
Second Vatican Council) does not forbid the
ad orientem position of the priest saying Mass: its
General Instruction only requires that in new or renovated churches the facing-the-people orientation be made possible: "The altar should be built separate from the wall, in such a way that it is possible to walk around it easily and that Mass can be celebrated at it facing the people, which is desirable wherever possible." As in some ancient churches the
ad orientem position was physically impossible, so today there are churches and chapels in which it is physically impossible for the priest to face the people throughout the Mass. A letter of 25 September 2000 from the
Congregation for Divine Worship and the Discipline of the Sacraments in the Roman Catholic Church treats the phrase "which is desirable wherever possible" as referring to the requirement that altars be built separate from the wall, not to the celebration of Mass facing the people, while "it reaffirms that the position toward the assembly seems more convenient inasmuch as it makes communication easier ... without excluding, however, the other possibility." This is also what is stated in the original text (in Latin) of the General Instruction of the Roman Missal (2002), which reads, "
Altare maius exstruatur a pariete seiunctum, ut facile circumiri et in eo celebratio versus populum peragi possit, quod expedit ubicumque possibile sit." As
quod is a neuter pronoun, it cannot refer back to the feminine
celebratio [versus populum] and mean that celebration facing the people
expedit ubicumque possible sit ("is desirable wherever possible"), but must refer to the entirety of the preceding phrase about building the altar separate from the wall so to facilitate walking around it and celebrating Mass at it while facing the people. On 13 January 2008, Pope
Benedict XVI of the Catholic Church publicly celebrated Mass in the
Sistine Chapel at its altar, which is attached to the
west wall. He later celebrated Mass at the same altar in the Sistine Chapel annually for the Feast of the
Baptism of the Lord. His celebration of Mass in the
Pauline Chapel in the Apostolic Palace on 1 December 2009 was reported to be the first time he publicly celebrated Mass
ad orientem on a freestanding altar. In reality, earlier that year the chapel had been remodeled, with "the previous altar back in its place, although still a short distance from the tabernacle, restoring the celebration of all 'facing the Lord'." On 15 April 2010 he again celebrated Mass in the same way in the same chapel and with the same group. The practice of saying Mass at the altar attached to the west wall of the Sistine Chapel on the Feast of the Baptism of the Lord was continued by
Pope Francis, when he celebrated the feast for the first time as Supreme Pontiff on 12 January 2014. Although neither before nor after the 20th-century revision of the
Roman Rite did liturgical norms impose either orientation, the distinction became so linked with traditionalist discussion that it was considered journalistically worthy of remark that Pope Francis celebrated Mass
ad orientem at an altar at which only this orientation was possible. In a conference in London on 5 July 2016,
Cardinal Robert Sarah, Prefect of the Congregation for Divine Worship and the Discipline of the Sacraments in the Catholic Church, encouraged priests to adopt the
ad orientem position from the first Sunday in
Advent at the end of that year. However, the
Vatican soon clarified that this was a personal view of the cardinal and that no official directives would be issued to change the prevailing practice of celebrating
versus populum.
Oriental Orthodox liturgy In
Oriental Orthodox Christianity, the liturgy of the Coptic and Ethiopian rites exhort believers with the words "Look towards the East!"
Lutheran liturgy Traditionally, in the
Lutheran Churches, the
Divine Service "is oriented to the East from which the Sun of Righteousness will return". Though some parishes now celebrate the
Mass versus populum, the traditional liturgical posture of ad orientem is retained by many Lutheran churches. Among
Eastern Lutheran churches that celebrate the
Byzantine Rite, the eastward position is universally practiced. priest in the
Church of Sweden elevating the host during a mass performed
ad orientem. Although the Church of Sweden missal/handbook doesn't prescribe one way or another, the prevailing norm since around the 1970s has been
versus populum. Ad orientem does still occur however, especially in older churches constructed with fixed altars in the
choir.
Anglican liturgy cathedral The English expression "
eastward position", which reflects the continuance in England of the traditional orientation abandoned elsewhere in the West, normally means not only "east-facing" but also unambiguously "the position of the celebrant of the Eucharist standing on the same side of the altar as the people, with his back to them". The opposite arrangement is likewise unambiguously called the "westward position". Those who use the phrase "
ad orientem" refrain from using the correspondingly ambiguous "
ad occidentem" phrase and speak of that arrangement instead as "
versus populum". With the
English Reformation, the
Church of England directed that the sacrament of the Holy Eucharist be celebrated at a communion table placed lengthwise in the chancel or in the body of the church, with the priest standing on the north side of the holy table, facing south. Turning to the east continued to be observed at certain points of the Anglican liturgy, including the saying of the
Gloria Patri,
Gloria in excelsis Deo and
ecumenical creeds in that direction.
Archbishop Laud, under direction from
Charles I of England, encouraged a return to the use of the altar at the east end, but in obedience to the
rubric in the
Book of Common Prayer the priest stood at the north end of the altar. In the middle of the 19th century, the
Oxford Movement gave rise to a return to the eastward-facing position, and use of the
versus populum position appeared in the second half of the 20th century. In the time when
Archibald Campbell Tait was
Archbishop of Canterbury (1868–1882), the eastward position, introduced by the
Oxford Movement, was the object of violent controversy, leading to its outlawing by the
Parliament of the United Kingdom in the
Public Worship Regulation Act 1874. In their pastoral letter of 1 March 1875, the Archbishops and Bishops of the Church of England lamented "the growing tendency to associate doctrinal significance with rites and ceremonies which do not necessarily involve it. For example, the position to be occupied by the minister during the prayer of consecration in the Holy Communion' [...] We, the clergy, are bound by every consideration to obey the law when thus clearly interpreted [...]". In spite of the legal prohibition, adoption of the eastward position became normal in the succeeding decades in most provinces of the Anglican Church with the exception of the
Church of Ireland. Then, from the 1960s onward, the
westward position largely replaced both eastward position and north side and, in the view of Colin Buchanan, "has proved a reconciling force within Anglican usage". "Over the course of the last forty years or so, a great many of those altars have either been removed and pulled out away from the wall or replaced by the kind of freestanding table-like altar", in "response to the popular sentiment that the priest ought not turn his back to the people during the service; the perception was that this represented an insult to the laity and their centrality in worship. Thus developed today's widespread practice in which the clergy stand behind the altar facing the people."
Methodist liturgy The
post-1992 United Methodist rubrics stated: == See also ==