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In page Aurelian:

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Aurelian returned to Rome and won his last honorific from the Senate – Restitutor Orbis ("Restorer of the World"). This title was first assumed by Aurelian in late summer of 272, and had been carried previously by both Valerian and Gallienus.[3] In four years, Aurelian had secured the frontiers of the Empire and reunified it.[citation needed]