When Augustus Reigned: Christmas Music From the Byzantine Tradition

Byzantine chant is the monophonic, a cappella liturgical music of the Eastern Roman (Byzantine) Church, sung primarily in Greek and organized around the octoechos (eight-mode) system. Its melodies are modal rather than harmonic, unfolding in one line supported in later practice by a sustained drone (ison). The repertory sets biblical psalms and hymnic poetry (e.g., troparia, kontakia, stichera, and canons) to melodies that follow textual accent and rhetorical pacing rather than strict meter. Notation employs neumes that encode melodic direction and ornate formulae, preserving a highly codified oral tradition. The sound is characterized by free rhythm, microtonal inflections in certain modes, and an austere, prayerful timbre designed for resonant ecclesiastical spaces. Byzantine chant remains central to the worship of the Eastern Orthodox Church and has shaped a wide family of chant traditions across the Mediterranean and Slavic worlds.