Some versions of the doctrine of divine simplicity imply that God lacks really differentiated parts. I present a new argument against these views based on divine beauty. The argument proceeds as follows: God is beautiful. If God is beautiful, then this beauty arises from some structure. If God’s beauty arises from a structure, then God possesses really differentiated parts. If these premises are true, then divine simplicity is false. I argue for each of the argument’s premises and defend it against (...) objections, including an objection based on analogical predication, and an objection that supposes that God is simple while appearing complex. (shrink)