Holy site

Mecca

Mecca, Kingdom of Arabia

Mecca is a holy site in Crusader Kings III, in Mecca, Kingdom of Arabia. The county's holder gets Monthly Piety +5%, Knight Effectiveness +5%. While their faith holds it, followers get Monthly Piety per Knight +2%. 8 faiths count it holy, among them Sadr al-Islam, Sunni, Shia, Kharijite and 4 more. Patch 1.20.0.3, from game/common/religion/holy_site_types/00_holy_site_types.txt.

The county's holder gets

Monthly Piety+5%
Knight Effectiveness+5%

Followers get, while their faith holds it

Monthly Piety per Knight+2%

Per level of enshrined relics

These grow with the total rarity of the relics enshrined at the site (holy_site_total_artifact_rarity): the value below is per level.

Followers

Knight Effectiveness+1%
GetLocalPlayerPietyTextIconLevel of Devotion Impact+1%

The county

Development Growth+1%
Danger-1

Source: game/common/religion/holy_site_types/00_holy_site_types.txt (key mecca), each faith's holy_site list, common/landed_titles and map_data, Crusader Kings III 1.20.0.3.