Byzantine Chant is a form of liturgical music used in the Eastern Orthodox Church and Eastern Catholic Churches. It is characterized by its monophonic texture, meaning it consists of a single melodic line without harmony. The chant is typically sung in Greek or Church Slavonic and is an essential part of religious services, enhancing the spiritual atmosphere. The music is based on a system of modes, similar to scales, which guide the melodic structure. Byzantine Chant is often performed by choirs or soloists and is known for its rich vocal techniques and expressive qualities. It has a long history, dating back to the early Christian period.