An antiphonary or antiphonal is one of the liturgical books intended for use in choro (i.e. in the liturgical choir), and originally characterized, as its name implies, by the assignment to it principally of the antiphons used in various parts of the Latin liturgical rites.
Medieval antiphonaries varied with regional liturgical tradition. In 1570, following the Council of Trent, the Roman Rite antiphonary was declared universal. The Roman Antiphonary (Antiphonale Romanum) contains the chants for the canonical hours for the hours of Lauds, Prime, Terce, Sext, None, Vespers and Compline for every day of the year. The Vesperale Romanum is an excerpt of the Antiphonary containing the chants sung at Vespers. The music for use at the Mass is contained in the Roman Gradual (Graduale Romanum), the chants of the ordinary are also edited as an excerpt from the Gradual, the Kyriale Romanum. The Antiphonale Romanum was substantially revised in 1910–11 in the course of the reform of the Roman Breviary under Pope Pius X, notably restoring authentic Gregorian melodies. For the 1971 "Liturgy of the Hours", there are two volumes, Antiphonale Romanum II and Liber Hymnarius.