schism.....
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 split between the Eastern Orthodox and the western Catholic Churches was caused by a number of different factors. Namely, neither side could decide on the Pope's role in the church, or the scope of his authority.
The Eastern Orthodox Church split from the Roman Catholic Church in 1054 due to disagreements over the authority of the Pope, theological differences, and cultural and political divisions between the East and West.
Your question is too general. There are many things that were not a cause of tension between these belief systems. The colour of my dog for instance
Yes, the issue of priestly celibacy is a point of contention between the Eastern Orthodox and Roman Catholic Churches. In the Eastern Orthodox Church, married men can become priests, while the Roman Catholic Church requires celibacy for priests. This difference has been a historical source of tension between the two churches.
The Great Schism was between the Roman Catholic Church and the Eastern Orthodox Church (or Catholicism and Eastern Orthodox).
To differentiate between Eastern Orthodox, Oriental Orthodox, Assyrian Church of the East one would use Roman Catholic.
Both began as forms of European Christianity. -Apex- :)
The Roman Catholic Church is normally known for using fresco's and Statues in their churches. Whereas The Eastern Orthodox Church uses mosaics and icons, with a small percentage of the time they will also use fresco's .
Christianity was split between the roman catholic church and the eastern orthodox church
Short answer: it was one of the causes of the split between the western and eastern Christian churches. The result of the split (schism) is the Catholic church (western) and Orthodox church (eastern).