Game concept

Eminent Holy Site

The game also links it as Eminent Holy Sites, Eminent.

From the game's encyclopedia

An Eminent Holy Site is a Holy Site of high importance to a Faith. Each Faith may designate only a few of its Holy Sites as Eminent.

Only Eminent Holy Sites contribute modifiers that affect all followers of a Faith.

The game's text for patch 1.20.1.2. Words in blue are entries of the encyclopedia: hover one to read it, as in the game.

Eminent Holy Site is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "An Eminent Holy Site is a Holy Site of high importance to a Faith." It is part of Holy Site. The game also links it as Eminent Holy Sites and Eminent. Patch 1.20.1.2, from game/common/game_concepts/pam_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.

for a guide, post or blog

Source: game/common/game_concepts/pam_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.