Some Orthodox Churches use the new Gregorian calendar, but most Orthodox Churches continue to use the old Julian calendar.
The two churches were the Eastern Orthodox and the Roman Catholic
the Eastern Orthodox Church and the Roman Catholic Church
The Eastern Orthodox faith was established in 1054 with the Great Schism. At this time, the East split from the West and established two churches: Eastern Orthodoxy and Roman Catholicism.
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)
The Eastern (Orthodox) and Western (Catholic) churches are the two main branches of Christianity. The Eastern Church is composed of national churches that are in communion with the Patriarch of Constantinople, while the Western Church is under the jurisdiction of the Pope in Rome. The two churches have different theological traditions and practices. The main differences between the Eastern (Orthodox) and Western (Catholic) churches are: -The Eastern Church uses the Byzantine Rite while the Western Church uses the Latin Rite. -The Eastern Church is organized into Patriarchates while the Western Church is organized into Dioceses. -The Eastern Church teaches that the Bishop of Rome is the first among equals while the Western Church teaches that the Bishop of Rome is the supreme Pontiff. -The Eastern Church is composed of national churches while the Western Church is composed of local churches 678217.
The Great Schism was between the Roman Catholic Church and the Eastern Orthodox Church (or Catholicism and Eastern Orthodox).
The Catholic Church in the West and the Orthodox Church in the East
Perhaps you are referring to the Western Catholic Church in the Roman Empire and the Eastern Orthodox Church in the Byzantine Empire.
The two Christian churches that developed after the split in 1054 are the Roman Catholic Church, based in Rome and headed by the Pope, and the Eastern Orthodox Church, which has its headquarters in Constantinople (modern-day Istanbul) and is led by various patriarchs.
There were two main churches: Roman Catholic and Orthodox. - UPDATE - Actually there were three main churches at the time, the Roman Catholic Church, Eastern Orthodox Church and Oriental Orthodox Church. The Oriental Orthodox Church was the first church to break away from the Orthodox Church (Eastern Orthodox Church) in 451AD followed by the Roman Catholic Church in 1054AD.
You have your wording incorrect. There is Eastern Orthodox, and Eastern Catholic. Both are different Churches. Eastern Orthodox: The Eastern Orthodox Church was once one Church along with the Roman Catholic Church until the Great Schism in 1054. After 1054, they have been two separate Churches. The difference easiest to recognize is their view of the Bishop of Rome (the Pope). The Roman Catholic Church believes that the Bishop of Rome has the final say in defining doctrine whereas the Eastern Orthodox Church believes Church doctrine can only change when it has been decided in an Ecumenical Council such as the seven that were held before the churches split. Eastern Catholic: The Eastern Catholic Churches are former Eastern Orthodox Churches that have enter back into communion with the Holy See. They still practice using Eastern Rites, however. (Ex. Married men can be ordained Priests, the Nicene Creed is read without the Filioque clause, etc.) Hope I answered your question. ~God Bless
Because the two Churches (Orthodox and Catholic) use different calendars to calculate the date of Easter (which is a movable holiday). The Orthodox Church uses the Julian calendar, whereas the Catholic Church uses the Gregorian calendar. The two Easters are not always a week apart (in 2007, they were on the same day), but that's usually the case.