There was no "Orthodox Church" at the beginning of the 11th century, they did not come into existence as a separate Church until 1054 A.D.
There has never been a "Roman Catholic Church". It's just Catholic, not Roman Catholic. Roman is an epithet first commonly used in England after the protestant revolt to describe the Catholic Church. It is never used by the official Catholic Church. What you are talking about is the Eastern Schism when the eastern Catholic Churches broke away from the Pope and formed what would become the Orthodox Church.
from
A Catholic Dictionary, edited by Donald Attwater,
Second edition, revised 1957
The Schism of the East
the estrangement and severance from the Holy See of what is now called the Orthodox Eastern Church was a gradual process extending over centuries. After a number of minor schisms the first serious, though short, break was that of Photius;
from then on tension between East and West increased, and the schism of Cerularius
occurred in 1054. From then on the breach gradually widened and has been definitive since 1472. There was a formal union from the 2nd
Council of Lyons in 1274 until 1282, and a more promising one after the Council of Florence from 1439 to 1472. After the capture of Constantinople it was in the Turkish interest to reopen and widen the breach with the powerful Roman church; the patriarchates of Alexandria, Antioch, and Jerusalem were dragged into this policy, Russia and the Slav churches stood out the longest of any: none of these churches, except Constantinople itself in 1472, formally and definitely broke away from the unity of the Church. But in the course of centuries the schism has set and crystallized into a definite separation from the Holy See of many million people with a true priesthood and valid sacraments. The origins, causes and development of the schism are matters of much complication, still not fully unraveled.
from
Modern Catholic Dictionary by John A. Hardon,
S.J.
Doubleday & Co., Inc. Garden City, NY 1980
Separation of the Christian Churches of the East from unity with Rome. The schism was centuries in the making and finally became fixed in 1054, when the Patriarch of Constantinople, Michael Cerularisu
(died 1059), was excommunicated by the papal legates for opposing the use of leavened bread by the Latin Church and removing the Pope's name from the diptychs or list of persons to be prayed for in the Eucharistic liturgy. A temporary reunion with Rome was effected by the Second Council of Lyons (1274) and the Council of Florence (1439) but never stabilized
The East–West Schism, commonly referred to as the Great Schism of 1054, is the break of communion between what are now the Eastern Orthodox and Catholic Churches, which began in the 11th century and continues.
The Byzantine army supported the emperor. There was a schism between the Catholic and Orthodox churches in the eleventh century. From that time onward the emperor was seen as the head of the Orthodox church, and the Pope as the head of the Catholic church.
Whether in Romania or elsewhere, the Orthodox Churches are national Churches which broke away from Communion with the Catholic Church in the 11th century. Their clergy and sacraments remain the same, and their liturgy is identical to the Catholic Uniate rites of the same rite, but they are still in schism, and thus not "the same".
The Roman Catholic and Eastern Orthodox Churches both have defensible claims to be the 'original' Christianity. Both churches can be traced back to the second century at least. Both churches recognise the other as a sect.
There are no "denominations" of the Catholic Church. One is either a Catholic or not. A Catholic is under the authority of the pope as the pope is the head of the church. There are other sects of the religion which are closely aligned theologically, but they are not Catholic and they are connoted as "Orthodox", such as the Russian Orthodox or the Greek Orthodox. Catholic Answer As the above answer points out, there are no denominations in the Catholic Church. However, there are historically different "rites" which are also know as Churches, although they are all Catholic Churches. Most of these Rites, particularly in the East, split in the eleventh century, so there is a Greek Orthodox Church and a Greek Uniate Church. The Greek Uniate Church is a "rite" in the Catholic Church under the Pope. A protestant might think these were denominations, as they appear very different, but they are not, and are all under the Pope.
Oh, dude, like a bunch of churches split off from the Catholic Church over the years. You've got the Eastern Orthodox Church, the Protestant churches, and even some smaller groups like the Anglican Church. So, yeah, the Catholic Church has kind of been the parent to a whole family tree of different churches.
Protestants by definition protest some Catholic teachings. The various branches of Protestantism broke away from the Catholic Church in the 1500s. Eastern Orthodox churches broke away earlier after disagreements over doctrine, so could also be said to "protest" some Catholic teachings, although Orthodox and Catholic churches are often said to be "in communion" with each other, which cannot be said of Catholic and Protestant Churches.
There are Eastern or Byzantine Rite Catholics but they are in full union with Rome as opposed to the Eastern Orthodox Churches which are not. There was a brief period in the 20th century, when a separate Orthodox Church broke away from the Eastern Orthodox Church in America and formed the America Orthodox Catholic Church. But it was yet another splinter of an already splintered Church. orthodox (small "O") means right belief, and thus is synonymous with Catholic. Now, there is also an Orthodox Catholic Church of America, also not in Communion with the Catholic Church. . You may read about the American Orthodox Catholic Church at the links below.
.Catholic AnswerThe Catholic Church was formed by Our Blessed Lord around the year 33 A.D. (1st century), Islam was started by Mohammed in the 7th century, and the Orthodox split from Rome (the Catholic Church) in the 12th century.
We do not know when the first schism in the Christian Church occurred. Even in the time of Saint Paul, he talks of opponents and those who taught a "different Christ". By the beginning of the second century, and probably earlier, Christianity was divided along two major lines: what is sometimes now called the proto-Catholic-Orthodox Church and the Gnostic Churches. Marcion made his break from Rome in the middle of the second century. The split of the Coptic Church from the Catholic-Orthodox Church occurred in 451 CE. The Great Schism of 1054 separated the Roman Catholic and Orthodox Churches. The Western Schism of the fourteenth century temporarily split the Catholic Church. The Protestant Reformation was the next major schism, in the sixteenth century.
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
It's just Catholic, not Roman Catholic. Roman is an epithet first commonly used in England after the protestant revolt to describe the Catholic Church. It is never used by the official Catholic Church. The Orthodox Churches separated from the Catholic Church in the 11th century in the Schism of the East.