Just been wondering but it says only high rank priests got masks. Does that mean that there are lesser priests across Skyrim, and if so are they leveled bosses? i.e. instead of a draugr overlord, a priest without a mask?
ESO shows two other Dragon Priests with Masks. The implication is that all sufficiently high-ranking Dragon Priests were gifted Masks, but those encountered in mainland Skyrim (whose masks may be placed at Bromjunaar) constitute the Cult's leadership.