sentences:  He served under Emperor Valentinian II, following him at the Eastern court when Magnus Maximus rebelled in the West.His date of death is unknown, though he was still living in 390 when, according to the "Vita Ambrosii" of Paulinus of Milan, two Persian noblemen presented themselves before Theodosius I at Mediolanum but departed the next day for Rome in order to see for themselves Petronius Probus, the pride of the Roman aristocracy, a legend in his own lifetime.On various inscriptions, Probus is described as "the summit of the Anician house" ("Aniciae domus culmen"), "most learned in all subjects" ("omnibus rebus eruditissimus") and "the acme of the nobility, the light of literature and eloquence" ("nobilitatis culmen, litterarum et eloquentiae lumen").