destroy_papacy_scripted_effect

destroy_papacy_scripted_effect = {
	save_scope_as = scoped_destroyer
	if = {
		limit = { exists = title:k_papal_state.holder }
		title:k_papal_state.holder = { save_scope_as = scoped_pope }
	}
	if = {
		limit = {
			exists = scope:scoped_pope
			scope:scoped_pope = { is_ai = no }
		}
		save_scope_value_as = { name = pope_was_player value = yes }
	}
	add_piety = massive_piety_gain
	root.faith = {
		change_fervor = {
			value = major_fervor_gain
			desc = fervor_gain_papacy_destroyed
		}
	}

	# Destroy the papacy title if it exists.
	if = {
		limit = {
			exists = title:k_papal_state
		}
		destroy_title = title:k_papal_state
	}

	# An AI Pope suffers a humiliating or tragic fate here. A player Pope instead gets roman_restoration.0132 and picks their own way out.
	if = {
		limit = {
			exists = scope:scoped_pope
			NOT = { exists = scope:pope_was_player }
		}
		if = {
			limit = {
				faith = {
					has_doctrine_parameter = human_sacrifice_active
				}
			}
			scope:scoped_pope = {
				death = {
					death_reason = death_sacrificed_to_gods
					killer = root
				}
			}
		}
		else_if = {
			limit = {
				faith.religion = faith:hellenic_pagan.religion
			}
			scope:scoped_pope = {
				death = {
					death_reason = death_crucified
					killer = root
				}
			}
		}
		else = {
			scope:scoped_pope = {
				set_character_faith = root.faith
				set_character_rite = root.rite
			}
		}

		if = {
			limit = { scope:scoped_pope.gold > 0 }
			scope:scoped_pope = {
				hidden_effect = { remove_short_term_gold = scope:scoped_pope.gold }
			}
		}
	}

	# Catholicism is now sad.
	faith:catholic = {
		change_fervor = {
			value = massive_fervor_loss
			desc = fervor_loss_papacy_destroyed
		}
		if = {
			limit = { has_doctrine = special_doctrine_ecumenical_christian }
			remove_doctrine = special_doctrine_ecumenical_christian
		}
		if = {
			limit = { has_doctrine = doctrine_spiritual_head }
			remove_doctrine = doctrine_spiritual_head
			hidden_effect = { add_doctrine = doctrine_no_head }
		}
	}
}

As written in game/common/scripted_effects/00_major_decisions_scripted_effects.txt.