The Mayan priest were known as?

The Nacom

Explanation:

These priests were special ones that cut out the beating heart of a previously living Human being and offered it to the Gods.

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).