Aureus - Constantius Chlorus MARTI PROPVGNATORI, Treveri

This aureus was struck at Treveri — modern Trier — during the Tetrarchy, when Constantius Chlorus governed the western provinces as Caesar under Maximian. The MARTI PROPVGNATORI reverse type, invoking Mars as the defender or champion, was politically pointed: Constantius had recently conducted campaigns against the Alamanni and was actively consolidating Roman authority along the Rhine frontier. Trier itself functioned as an imperial capital in all but name during this period, its mint producing gold of consistent quality to pay troops and signal dynastic stability.

The Beaurains hoard, discovered in northern France in 1922, contained multiple examples of this type and remains the primary source for understanding its distribution and die sequence.