How ancient are the Orthodox liturgical services?
Eastern Orthodox services trace their beginnings back to the Old Testament liturgical rites and services of the Hebrews. They are a treasury of Scripture readings, prayers, hymns, and canons composed by the Saints and pious Christians throughout the ages. Like our Jewish predecessors, Orthodox services are liturgical, sacramental, and ceremonial. Many of the hymns you hear come from the Psalms. Most of them are sung or chanted, as has been the tradition since the days of Jewish – Christian practice. Some of the ancient document sources of the Orthodox liturgical order of service go back to the second (Justin Martyr, c. A.D. 150) and third centuries (Hippolytus, c. 215 A.D.). Eastern liturgies went through development in the fourth and fifth centuries. They became stabilized in the sixth century, and by the eight century were so fixed that they have not changed even today.
