Nummus - Constantinus I SOLI INVICTO COMITI, Siscia

By 317, Constantine's relationship with the sun cult was already theologically complicated — he had been issuing SOLI INVICTO COMITI ("to the Unconquered Sun, companion") types since around 310, years before the Council of Nicaea would force a harder doctrinal line. The Siscia mint, reopened by Diocletian and expanded under the Tetrarchy, was one of the most productive in the western Balkans and handled a significant share of bronze for the Danubian frontier garrisons. RIC VII Siscia 32 falls in the immediate aftermath of the Crispus and Licinius Caesar proclamations of March 317, a moment of fragile dynastic consolidation between Constantine and his eastern co-emperor.