gok_upgrade_realm_and_government_effect

gok_upgrade_realm_and_government_effect = {
	if = {
		limit = {
			exists = scope:realm_culture_1
		}
		culture = {
			get_random_innovation_from = scope:realm_culture_1
		}
	}
	if = {
		limit = {
			exists = scope:realm_culture_2
		}
		culture = {
			get_random_innovation_from = scope:realm_culture_2
		}
	}
	if = {
		limit = {
			exists = scope:realm_culture_3
		}
		culture = {
			get_random_innovation_from = scope:realm_culture_3
		}
	}

	capital_county = {
		if = {
			limit = {
				any_county_province = {
					OR = {
						has_holding_type = nomad_holding
						has_holding_type = herder_holding
					}
				}
			}
			add_county_modifier = {
				modifier = great_khans_capital_modifier
				years = 30
			}
		}
		custom_tooltip = gok_capital_holdings_switch_tt

		hidden_effect = {
			every_county_province = {
				limit = {
					has_holding = yes
					OR = {
						has_holding_type = nomad_holding
						has_holding_type = herder_holding
					}
				}
				holding_pre_feudalize_effect = yes
				set_holding_type = castle_holding
				add_building = castle_02
				if = {
					limit = {
						any_culture_global = {
							has_cultural_era_or_later = culture_era_high_medieval
						}
					}
					add_building = castle_03
				}
				if = {
					limit = {
						any_culture_global = {
							has_cultural_era_or_later = culture_era_late_medieval
						}
					}
					add_building = castle_04
				}
			}
			random_county_province = {
				limit = {
					has_holding = no
				}
				save_scope_as = capital_prov_1
				set_holding_type = church_holding

				if = {
					limit = {
						any_culture_global = {
							has_cultural_era_or_later = culture_era_high_medieval
						}
					}
					add_building = temple_03
				}
				if = {
					limit = {
						any_culture_global = {
							has_cultural_era_or_later = culture_era_late_medieval
						}
					}
					add_building = temple_02
				}
			}
			random_county_province = {
				limit = {
					exists = scope:capital_prov_1
					has_holding = no
					NOT = {
						this = scope:capital_prov_1
					}
				}
				set_holding_type = city_holding

				if = {
					limit = {
						any_culture_global = {
							has_cultural_era_or_later = culture_era_high_medieval
						}
					}
					add_building = city_03
				}
				if = {
					limit = {
						any_culture_global = {
							has_cultural_era_or_later = culture_era_late_medieval
						}
					}

As written in game/common/scripted_effects/09_mpo_greatest_of_khans_effects.txt.