3. Byzantine Rejection Of The Pope
The Great Schism of 1054 was the division of the Christian church into two: the Western (the Roman Catholic Church) and the Eastern or Byzantine Empire (the Eastern Orthodox Church).
The breakup was the result of years of tensions arising from theological and political differences between them. One significant event that marked the end of the union was the Byzantine Rejection Of The Pope, whom the Roman Church regarded as the spiritual leader in Rome and someone who had authority over the patriarchs (religious leaders in the east). The conflict resulted in their inevitable division.