Answer:
primacy of Rome's bishop compared to others religious icons
Step-by-step explanation:
Schism occurred between the Eastern and Western churches due to religious and political differences. This was the period were Protestant churches sprung up and they were against having the Pope which was the head of the Roman Catholic Church as the leader of all Christian church denominations.
Another issue was about the importance of using unleavened bread only for holy communion as some argued that leavened could also be used.