The Graduale romanum (1974 edition) is the official songbook of the Latin Church. This book contains all the noted pieces of the Gregorian repertoire of the Mass according to the ordinary form of the Roman ritual. Namely, the proper of the songs for all the days of the liturgical year, the proper and the common of the saints, the indications for the votive masses and the masses for particular circumstances. It also contains all the pieces of the Kyriale romanum , the common tones of the Ordinary of the Mass ( Ordo Missæ ). We will also find in the appendix various songs as well as the proper of the saints of the Order of Saint Benedict.