The Byzantine Church refers to the Christian church that developed in the Byzantine Empire, which was centered in Constantinople (modern-day Istanbul). It is known for its rich traditions, including the use of Greek in liturgy and the veneration of icons. The church played a significant role in the cultural and political life of the empire, influencing art, architecture, and theology. The Byzantine Church is often associated with the Eastern Orthodox Church, which emerged from the schism with the Roman Catholic Church in 1054. Its practices include the Divine Liturgy, which is a central form of worship, and the celebration of various feasts and saints' days, reflecting the church's deep historical roots and spiritual heritage.