A missal is a liturgical book containing instructions and texts necessary for the celebration of Mass throughout the liturgical year. Versions differ across liturgical tradition, period, and purpose, with some missals intended to enable a priest to celebrate Mass publicly and others for private and lay use. The texts of the most common Eucharistic liturgy in the world, the Catholic Church's Mass of Paul VI of the Roman Rite, are contained in the 1970 edition of the Roman Missal. Missals have also been published for earlier forms of the Roman Rite and other Latin liturgical rites. Other liturgical books typically contain the Eucharistic liturgies of other ritual traditions, but missals exist for the Byzantine Rites, Eastern Orthodox Western Rites, and Anglican liturgies. History Before the compilation of such books, several books were used when celebrating Mass. These included the gradual (texts mainly from the Psalms, with musical notes added), the evangelary or gospel book, the epistolary with texts from other parts of the New Testament, mainly the epistles (letters) of Saint Paul, and the sacramentary with the prayers that the priest himself said. In late mediaeval times, when it had become common in the West for priests to say Mass without the assistance of a choir and other ministers, these books began to be combined into a "Mass book" (missale in Latin), for the priest's use alone. This led to the appearance of the missale plenum ("full or complete missal"), which contained all the texts of the Mass, but without the music of the choir parts. Indications of the rubrics to be followed were also added. Latin Catholicism The Roman Missal (Missale Romanum), published by Pope Pius V in 1570, eventually replaced the widespread use of different missal traditions by different parts of the church, such as those of Troyes, Sarum (Salisbury), and others. Many episcopal sees had some local prayers and feast days in addition. At the behest of the Second Vatican Council, Pope Paul VI greatly increased the amount of Sacred Scripture read at Mass and, to a lesser extent, the prayer formulas. This necessitated a return to having the Scripture readings in a separate book, known as the Lectionary. A separate Book of the Gospels, with texts extracted from the Lectionary, is recommended, but is not obligatory. The Roman Missal continues to include elaborate rubrics, as well as antiphons etc., which were not in sacramentaries. The first