Between 500-1300, how did the ideas and practice of Christian communities throughout the Afro-Eurasian world differ from one another?

Explanation:

It is noteworthy that the main difference between Christian communities throughout the Afro-Eurasian world was in their doctrines and customs.

For example, the Eastern Christian Orthodox groups are said to believe in using unleavened bread, and priests are allowed to get married and remain unshaved.

However, the Roman Catholics are said to use leavened bread, not unleaved bread, and priests are required to remain unmarried and to be shaved.

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