A chief priest or the highest-ranking priest in a Roman or religious hierarchy.
From Greek 'archi-' (chief) + 'flamen' (Latin for priest or one who kindles). The flamen were priests of specific gods in Roman religion; the archflamen was their superior.
In ancient Rome, the Flamen Dialis (priest of Jupiter) was so sacred that he had hundreds of bizarre religious rules—and his boss, the archflamen, had to know and enforce them all!
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