Kyriale

The Kyriale is a collection of Gregorian chant settings for the Ordinary of the Mass. It contains eighteen Masses (each consisting of the Kyrie, Gloria, Sanctus, and Agnus Dei), six Credos, and several ad libitum chants. This collection is included in liturgical books such as the Graduale Romanum and Liber Usualis, and it is also published as a separate book by the monks of Solesmes Abbey.