Flavius Magnus Magnentius Golden multiplus by Magnentius Usurper of the Roman Empire Reign January 18, 350 – August 11, 353 Predecessor Constans Successor Constantius II Born 303 Samarobriva, Gaul Died (353-08-11)August 11, 353 (aged 50) Mons Seleucus Wife Justina Regnal name Imperator Caesar Flavius Magnus Magnentius Augustus