No, the Orthodox Church was founded in the year 33 AD on the day of Pentecost. From that time onwards, it has remained unchanged for over 2,000, keeping faithful to the beliefs and traditions of Jesus Christ and the Apostles. It also has an unbroken succession of bishops (called Apostolic Succession), who can trace their history from the New Testament Apostolic era to the present day.
There is an Orthodox Church and a Catholic Church. There is no Catholic Orthodox Church.
Eastern Orthodox Church (or the Christian Orthodox Church).
That's a bit difficult to explain. There was one church called 'The Catholic Orthodox church" it split into Orthodox and Catholic. However there are two Orthodox churches which both preserve the ancient teachings and traditions of the original church. Except have a different view of the divintiy of christ. The Eastern "Oriental' Orthodox church believes that christ has two natures but united while the Eastern Orthodox church believes that chirst has two natures but seperate. However,they both are the original church and have not changed the apostolic traditions. So the Roman Catholic Church and Orthodox Churches are equally old since they were both founded by one of the apostles,however the Orthodox church stayed true to the original churches beliefs and traditions. But they became referred to as "Orthodox" in 451 AD (Eastern "Oriental' Orthodox) and in 1054 (Eastern Orthodox)
Assuming no divorce has taken place, which would require an annulment, yes, if you have changed from Orthodox to Catholic it would be possible to renew your wedding vows in a Catholic Church. There would be no need for a full blown wedding, however, as the Catholic Church does accept the sacraments of the Orthodox Church as valid.
No, the Greek Orthodox church is a part of the Eastern Orthodox Churches.
Anglican Orthodox Church was created in 2001.
The Orthodox Church and the Roman Church both have apostolic succession so they are equally old. Anyway at one stage they were one church called the Catholic Orthodox Church or The Universal Truth. The western church (Catholic) wanted to change the creed (a sum of the faith) and started declaring papal supremacy over the other churches - the Orthodox church views the St.Peter on the rock thing a Primacy of Honour not infallibility since Jesus did not make one apostle greater than the other. These were the main events that caused the 1054 schism and creating officially the Catholic and Orthodox Church. However seeing how the Catholic Church changed its teachings,liturgy among other things. The Orthodox Church did not change anything before or after the 1054 schism That is why the Catholic Church views the Orthodox Church as valid, but the Orthodox Church doesn't for the Catholic Church
The Orthodox Church of Greece (Eastern Orthodox Church).
Its a faith (church). Bulgarians follow Orthodox church
The Coptic Orthodox Church
The Romanian Orthodox Church mainly follows the liturgical practice of the Greek Orthodox Church, rather than the Russian Orthodox Church, such as the use of the new calendar.
Syriac Orthodox Church's population is 5,600,000.