Kyriale

The Kyriale is a liturgical book of Gregorian chant used in the Roman Catholic Church. It contains the music settings for the Ordinary of the Mass (Kyrie, Gloria, Credo, Sanctus, Agnus Dei) in Gregorian chant, offering a repertory of melodies appropriate for different liturgical seasons and celebrations. In practice, churches may choose among several melodies for each text; the Kyriale thus serves as a standard reference for composers, organists, and choirs preparing Masses in the Latin rite. The Kyriale is distinct from the Graduale, which contains the proper chants for specific feasts and days.

The Kyriale has its roots in medieval chant but was compiled into organized collections in the early modern era; its current form and nomenclature were shaped by liturgical editors in the 17th–20th centuries. Notable editions include the Solesmes edition and other Catholic publishers; post-Vatican II there are simplified editions such as Kyriale Simplex for use in parish settings.

It remains a standard resource in the Catholic liturgical music tradition, informing church music performances and scholarship on Gregorian chant.