3082037 Bust of Emperor Gratian, (4th century) (Marble) by Roman, (4th century BC); Rheinisches Landesmuseum, Trier, Germany; (add.info.: Gratian (359 ??383) was Roman emperor from 367 to 383. The eldest son of Valentinian I, during his youth Gratian accompanied his father on several campaigns along the Rhine and Danube frontiers. Upon the death of Valentinian in 375, Gratian\'s brother Valentinian II was declared emperor by his father\'s soldiers;); Prismatic Pictures ; out of copyright.