Solidus - Valentinian III SALVS REIPVBLICAE, Constantinopolis

Valentinian III was only four years old when this coin was struck. His mother Galla Placidia ruled as regent, and real power in the West sat with the general Aetius and the eastern court of Theodosius II, who had militarily installed the child emperor in Ravenna in 425 after defeating the usurper Joannes. These solidi, struck at Constantinople rather than a western mint, underscore just how dependent the new western regime was on eastern support — the coins themselves are a product of that dependency.