"Sometimes called the Eastern Orthodox Church, the Orthodox Church is the first Christian Church, the Church founded by the Lord Jesus Christ and described in the pages of the New Testament. Her history can be traced in unbroken continuity all the way back to Christ and His Twelve Apostles. For twenty centuries, she has continued in her undiminished and unaltered faith and practice. Today her apostolic doctrine, worship, and structure remain intact. The Orthodox Church maintains that the Church is the living Body of Jesus Christ."
Antiochian Orthodox Christian Archdiocese of North America.