Tremissis - Theodosius II VICTORIA AVGVSTORVM, Constantinopolis

Theodosius II ruled the Eastern Empire for 42 years — the longest reign of any emperor in the dynasty — yet his administration was defined less by military ambition than by bureaucratic consolidation and the codification of Roman law completed in 438. The tremissis as a denomination had been regularized under Valentinian I and became the workhorse of long-distance commercial transactions across the late antique Mediterranean, its gold purity reliable enough to circulate well beyond imperial frontiers into Persian and Gothic territory.

Constantinople's mint by this period was the dominant producer of Eastern gold, with strict weight standards enforced through the comes sacrarum largitionum.