A dispute over the Nicene Creed, caused the schism between Catholic & Orthodox Christianity.
The Pope's claim of supremacy or authority over the church is what caused the Schism in the church in the late 1300s.
The schism in the Christian Church (A.D. 1054) brought about two groups - the Catholic Church and the Orthodox Church in the East.
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.
William M'Combie has written: 'The Christian church considered in relation to unity and schism' -- subject(s): Accessible book, Christian union, Schism, Church
Eastern Schism.
Caused confusion and doubt among Christians
The East-West Schism, or the Photian Schism (so named because it was provoked by Photius, the Archbishop of Constantinople).
It was over the selling of indulgences. Basically you were allowed to pay money to the church in order to be absolved of sins. This goes against the teachings in the bible according to some people (Martin Luther, who protested this) and caused a schism in the Christian Faith (This is for protestants, for orthodox it is something completely different)
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.
the Eastern Orthodox Church and the Roman Catholic Church
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.
The Churches that came out of the Great Schism of 1054 both claimed to be the original Christian Church. One was the Roman Catholic Church and the other was the Orthodox Church, although this is a more general term for a group of Churches with more than one Patriarch.