A breviary (Latin: breviarium) is a liturgical book used in Christianity for praying the canonical hours, usually recited at seven fixed prayer times.
Historically, different breviaries were used in the various parts of Christendom, such as Aberdeen Breviary, Belleville Breviary, Stowe Breviary and Isabella Breviary, although eventually the Roman Breviary became the standard within the Roman Catholic Church (though it was later supplanted with the Liturgy of the Hours); in other Christian denominations such as the Lutheran Churches, different breviaries continue to be used, such as The Brotherhood Prayer Book.
In the Catholic Church, Pope Nicholas III approved a Franciscan breviary, for use in that religious order, and this was the first text that bore the title of breviary. However, the "contents of the breviary, in their essential parts, are derived from the early ages of Christianity", consisting of psalms, Scripture lessons, writings of the Church Fathers, as well as hymns and prayers.
The ancient breviary of the Bridgettines had been in use for more than 125 years before the Council of Trent and so was exempt from the Constitution of Pope Pius V which abolished the use of breviaries differing from that of Rome.
In 2015, The Syon Breviary of the Bridgettines was published for the first time in English (from Latin). This was done in celebration of the 600th anniversary of Syon Abbey, founded in 1415 by King Henry V. Following the Oxford Movement in the Anglican Communion, in 1916, the Anglican Breviary was published by the Frank Gavin Liturgical Foundation.
In Lutheranism, the Diakonie Neuendettelsau religious institute uses a breviary unique to the order; For All the Saints: A Prayer Book for and by the Church, among many other breviaries such as The Daily Office: Matins and Vespers, Based on Traditional Liturgical Patterns, with Scripture Readings, Hymns, Canticles, Litanies, Collects, and the Psalter, Designed for Private Devotion or Group Worship, are popular in Lutheran usage as well.