No, because 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.
Prior to the fall of the Romanovs and the rise of Communism, Russians were predominantly Russian Orthodox Catholics (as compared to Greek Orthodox or Roman Catholicism).
The Greek Orthodox Church is one of the oldest Christian traditions, tracing its roots back to the early Christian communities in Byzantium in the first century AD. It officially became separate from the Roman Catholic Church in 1054 with the Great Schism.
Actually, St. Patrick lived before the schism between Greek (Eastern) Orthodoxy and Roman Catholicism, so both consider him a saint.
That would be "Roman Catholicism". It is a Christian religion that believes in the Holy Trinity of God, Jesus, and the Holy Spirit. There are other type of Catholic churches, like the Greek Orthodox or the Russian Orthodox.
Because Roman Catholicism did not even exist at that time (988 AD) when Prince Vladimir of Kiev decided that Orthodox Christianity was the true religion for his people.
The Great Schism was between the Roman Catholic Church and the Eastern Orthodox Church (or Catholicism and Eastern Orthodox).
Orthodox Christianity (like Roman Catholicism) is the oldest Christian faith and can be traced back to the Apostles and Jesus Christ.
The Orthodox Church as it is today was established at the Great Schism of 1054, when Christianity split into the East (Eastern Orthodoxy) and the West (Roman Catholicism).
Greek Orthodox.
monasticism (as in monstraries were very important)
The city of Rome is very important to Roman Catholics and is where the Pope lives but Roman Catholicism itself is not based on a geographic region. Eastern and Greek Orthodox both started or are mostly in certain regions. However it is more about where these religions are more popularly practiced than the geographic location itself.
Roman Catholicism. .................................... Christianity is the religion. Roman Catholicism is one church or major division within Christianity. The Protestant Church and Orthodox Church are other major divisions.