If you mean, what religion is it based on, it isn't based upon another religion. It could be considered the root of Christianity, as it traces its patriarchy (kind of like the Pope) directly back to Jesus Christ and the Apostles.
If you meant, what ideas is it based on, the simplest answer would be that it is based on the idea of the Holy Trinity (as God the Father, the Son, and the Holy Spirit), and subscribes to a traditional belief in the Resurrection of Christ and veneration of the Virgin Mary.
Eastern Orthodox is a branch of Christianity.
Greek Orthodox.
Victoria Azarenka's religion is Orthodox Christianity.
Eastern Orthodox
Eastern Orthodox
Russian Eastern Orthodox
Eastern Orthodox religion is strongest in countries such as Russia, Greece, Romania, Ukraine, Bulgaria, and Serbia. These countries have a significant proportion of their population following the Eastern Orthodox faith.
Eastern Orthodox
Eastern Orthodox
It was the Orthodox Church, or The Eastern Orthodox Church.
The eastern orthodox is a religion that was developed in Europe when the ''Vandals'' as you might know invaded the western part of Europe. It fell into the dark ages. The Eastern Europe celebrated and worshiped eastern orthodox. This religion is Christian.
The Eastern Orthodox religions