Abstract
The history of Ammianus Marcellinus states that Constantius II renamed the Pontic diocese Pietas, in honour of his second wife, Aurelia Eusebia . pietas refers to sacred dutiful conduct toward all, specifically gods, state, and family. Constantius’ purpose in renaming the diocese poses an interesting question because it holds an important key to understanding the role Eusebia played in supporting her husband's position as emperor. In other words, what kind of part could an empress play in the Late Empire? Constantius may indeed have been honouring his wife. Why, however, would he honour her so? Is pietas just a play on the empress's name, which means ‘piety’ in Greek, or is there a deeper meaning? A search of late Imperial evidence on this woman and etymology on this word is needed