Byzantine Church Music is a form of liturgical music that originated in the Byzantine Empire and is closely associated with the Eastern Orthodox Church. It is characterized by its use of vocal harmonies, modal scales, and a rich tradition of chanting. The music is typically performed a cappella, meaning without instrumental accompaniment, and is integral to the worship services. The melodies of Byzantine Church Music are often based on ancient Greek musical theories and are designed to enhance the spiritual experience of the liturgy. This music has been preserved through centuries, with notable contributions from composers like Saint John of Damascus and continues to be an important aspect of Orthodox Christian worship today.