add_random_external_ecclesiastical_domicile_building

add_random_external_ecclesiastical_domicile_building = {
	if = {
		limit = { free_external_domicile_building_slots >= 1 }
		random_list = {
			10 = {
				trigger = { NOT = { has_domicile_building_or_higher = baptistery_01 } }
				add_domicile_building = baptistery_01
			}
			10 = {
				trigger = { NOT = { has_domicile_building_or_higher = church_school_01 } }
				add_domicile_building = church_school_01
			}
			10 = {
				trigger = { NOT = { has_domicile_building_or_higher = church_archives_01 } }
				add_domicile_building = church_archives_01
			}
			10 = {
				trigger = { NOT = { has_domicile_building_or_higher = church_guard_tower_01 } }
				add_domicile_building = church_guard_tower_01
			}
			10 = {
				trigger = {
					NOT = { has_domicile_building_or_higher = chancery_01 }
					owner.culture ?= { has_innovation = innovation_chronicle_writing }
				}
				add_domicile_building = chancery_01
			}
			10 = {
				trigger = { NOT = { has_domicile_building_or_higher = church_treasury_01 } }
				add_domicile_building = church_treasury_01
			}
			10 = {
				trigger = {
					NOT = { has_domicile_building_or_higher = cloister_01 }
					owner.capital_county.clerical_region_title ?= {
						any_county_in_clerical_region = {
							any_county_province = {
								barony = { is_leased_out = yes }
							}
						}
					}
				}
				add_domicile_building = cloister_01
			}
			5 = {
				trigger = { NOT = { has_domicile_building_or_higher = episcopal_palace_01 } }
				add_domicile_building = episcopal_palace_01
			}
		}
	}
}

As written in game/common/scripted_effects/11_dlc_pam_scripted_effects.txt.