Roman Catholic practice Within the
Carolingian Empire (800–888), a form of the
liturgy of the hours, described by
Amalarius, was imposed that can be called the "Roman-Benedictine Office". In this form, the first nocturn of the Sunday vigil or matins had twelve psalms sung in three groups of four psalms, each group treated as a single psalm with a single doxology at the end. This was followed by three readings, each with a responsory. In each of the other two nocturns the readings and responsories were also three, but each nocturn had only three individual psalms instead of three groups of four. The ferial vigil had only one nocturn, composed of six groups of two psalms, followed by three readings with their responsories. On the basis of the practice of the
Roman Curia the texts and rubrics of the various books used for the celebration of the liturgy of the hours were combined at the beginning of the thirteenth century into the
Breviarium secundum usum Romanae Curiae. A revision of this under
Pope Honorius III was adopted by the
Franciscans and by them popularized throughout Europe. It introduced many hymns but also led to celebration being spoken rather than sung. It was the main basis of
Pope Pius V's
Roman Breviary of 1568, the contents of which became much more the private prayer of the clergy than the communal prayer of the Christian people, and the canonical hours became disassociated from particular times of the day. This tendency of viewing the Liturgy of the Hours as edification and spiritual nourishment of individual clergy rather than a form of worship had been strengthened by the publication in 1535, and the widespread printing of the drastically modified breviary of Cardinal
Francisco de Quiñones, which restored generally the weekly recitation of the whole psalter and the reading of the major part of the Bible in a year, but which provoked a reaction that led to the determination of the
Council of Trent to restore a somewhat purified form of the previously existing form of the Liturgy of the Hours. It fell to
Pope Pius V to put into effect the Council's desire. In the
Roman Breviary as arranged by Pope Pius V in 1568, Sunday matins has three nocturns, the first with 12 independent psalms, the second and third with 3 psalms each, and each nocturn has 3 readings. Feasts of double or semidouble rank have 3 nocturns, each with 3 psalms and 3 readings. On a feast of simple rank, a
feria or a vigil day, there is no division into nocturns and the 12 psalms and 3 readings are treated as a single nocturn. In comparison with the post-Vatican II revision, the readings are very brief. In 1911
Pope Pius X introduced a radical revision of the psalter of the
Roman Breviary. He ended many of the previous repetitions of the same psalms day after day. For instance, Psalms 148–150, which previously were said every day at the end of lauds and which may have given that hour the name of "lauds", were each said only once in the week and no longer together. The longer psalms were divided into portions, which in many cases were assigned to different hours and days. In his completely new arrangement, matins
always had nine psalms or portions of psalms, whether distributed in groups of three among three nocturns, each nocturn of which had three readings, or, on liturgically less important days, recited as a single group and followed by only three readings. It was planned to proceed also to a revision of the readings at matins in view of the excessive abbreviation of the scriptural readings and the inclusion of unhistorical content in the accounts of the saints. This revision was not in fact carried out until after the
Second Vatican Council, but concrete work on it had already begun under
Pope Pius XII. The 1960
Code of Rubrics of
Pope John XXIII specified what celebrations had three nocturns: • Feasts of I or II class; • Ferias of the
Triduum sacrum; • Octave Day of Christmas; • All Souls' Day. The Code of Rubrics removed the multiplicity of nocturns from matins of Sundays, apart from those that were I class feasts (Easter and Pentecost). This required a reduction in the number of readings. The three former scriptural readings were combined into two, and the first part of the homily in the previous third nocturn became the new third reading.
Abolition of nocturns With his
apostolic constitution Laudis canticum of 1 November 1970,
Pope Paul VI announced his revision of the Latin-Church Liturgy of the Hours, involving among other things distribution of the psalms over a period of four weeks instead of the previous arrangement whereby they were said within a single week. In line with the decision of the
Second Vatican Council that matins, while retaining its character of nocturnal praise should become a prayer for any hour of the day, that canonical hour was renamed the
Office of Readings and to it were assigned two substantial readings, one from Scripture, the second from the
Fathers of the Church or other writers, and only three psalms or portions of psalms. This contrasted strongly with the arrangement to which the Rule of Saint Benedict gave witness: twelve complete psalms, to which on Sundays three canticles were added. In the Benedictine system, the psalms and the readings were distributed among two or three nocturns. Between Benedict and Paul VI the two-nocturns arrangement had been done away with, and on days when matins was not divided into three nocturns it was spoken of as being of a single "nocturn". With the reform of Paul VI, the term "nocturns", whether in the singular or the plural form, ceased to be used. ==Oriental Orthodox Christianity==