Missale plenum

A Missale plenum, or "Full Missal," is a book used in the Roman Catholic Church that contains all the prayers, chants, responses, and instructions needed for celebrating the Mass throughout the year. This comprehensive volume evolved from various earlier books, such as the sacramentary, lectionary, cantatorium, and antiphonary, which were gradually combined into one. By the 13th century, the Missale plenum had become the standard, replacing the older, separate books. Modern missals are all of this type. The Council of Trent in the 16th century led to a revised Roman Missal, and further significant revisions occurred after the Second Vatican Council, with the introduction of vernacular languages and updated scripture readings.1