The classic exploration of Syriac liturgical melodies, the work of Dom Jeannin has no rivals. Beginning with a discussion of the nature of Beth Gazo, the treasury of chants, this work provides a careful introduction to the various types of liturgical music found in the church. Homilies in strophic form, the popular poetry of the fifth-century qole, antiphonal psalms, anthems, melismatic hymns or litanies, and melodies from Mosul are just part of the service music and hymnody discussed in the introduction and presented with their melodies in Syriac.