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Orthodoxy, Catholicism, and Protestantism
Christianity. In Latvia, Lutheranism, Catholicism and Orthodoxy. In Estonia, Lutheranism and Orthodoxy
Christianity split into Catholicism & Orthodoxy.
No
Russian Orthodoxy is not part of the Catholic religion. I don't know the exact time or history, but Catholicism came about once it broke away from Orthodoxy. Hence, Catholicism is the first religion to break away from Orthodoxy. Historically, Orthodoxy is the first established Christian religion, Catholics upon breaking away, became the 2nd Christian religion.
Islam   45% Serb Orthodoxy   36% Roman Catholicism   15% Others   1%
Saint Joseph is celebrated to one extent or another all over the world. He is venerated in Catholicism, Anglicanism, Lutheranism, Eastern Orthodoxy, Oriental Orthodoxy.
Eastern Orthodoxy is one form of Christianity. Some more may be Roman Catholicism or Protestantism.
Catholicism. They make up their own rules as they go along.
I assume you mean the official split into Eastern Orthodoxy and Roman Catholicism, which happened in 1054.
W. A. Visser 'T Hooft has written: 'Anglo-Catholicism and orthodoxy'
This is a question which has divided Eastern Orthodoxy from Roman Catholicism and what might be called Western Christianity (the protestant churches plus Roman Catholicism). Eastern Orthodoxy holds that the Spirit proceeds from the Father alone, not from the Father and the Son - which is the belief of Western Christianity.