Who are the persons who are credited with establishing Eastern Orthodox Christianity?

Answer 1

Jesus Christ established the Orthodox Church in 33 AD, to provide for the salvation of humanity, since the Church is regarded as Christ's Body.

For over 1,000 there was only one Christian Church throughout the world, known as the "One, Holy, Catholic, and Apostolic Church of Christ" or simply the "Universal Church." At this time, there was no such thing as a Roman Catholic or Orthodox Church. These titles were given in the 11th Century, after the Great Schism of 1054 AD, which caused a split to emerge in the Church. This was owing to growing theological differences between the Latin West and the Orthodox East. From then onwards, those who remained faithful to the Church Councils became known as Orthodox Christians, and those who remained faithful to the authority of the Pope in Rome, became known as Latins or Catholics. From then onwards, the Catholics had many other groups split from it and new groups emerged, such as the Protestants in 1517 AD, the Baptists in the 1600's, the Pentecostals in the 1900's and so on. The Orthodox Church continued to maintain what it regards as the true faith, which it has kept unchanged since the time of Christ and His Apostles. This unbroken chain or line of bishops is known as The Apostolic Succession, which means that the Orthodox Church can trace its history right back from the 1st Century AD until the present day