give_destroyed_artifact_piety

give_destroyed_artifact_piety = {
	add_piety = {
		# Base value
		value = 5
		# Add the artifact's quality
		if = {
			limit = { exists = scope:artifact.var:quality }
			add = scope:artifact.var:quality
		}
		# If none can be found, add its wealth
		else_if = {
			limit = { exists = scope:artifact.var:wealth }
			add = scope:artifact.var:wealth
		}
		# Artifact has no quality or wealth (typical for court artifacts), add something based on rarity
		else_if = {
			limit = {
				scope:artifact = { rarity = illustrious }
			}
			add = {
				value = 20
			}
		}
		else_if = {
			limit = {
				scope:artifact = { rarity = famed }
			}
			add = {
				value = 12
			}
		}
		else_if = {
			limit = {
				scope:artifact = { rarity = masterwork }
			}
			add = {
				value = 8
			}
		}
		else = {
			add = {
				value = 4
			}
		}
		# Boost the value up to something meaningful
		multiply = 20
		# Holy Relics are way cooler to burn, double the final value
		if = {
			limit = {
				scope:artifact = { is_holy_relic = yes }
			}
			multiply = {
				value = 2
				desc = aniconist_destroying_relic
			}
		}
	}
}

As written in game/common/scripted_effects/00_ep1_artifact_effects.txt.