In the wake of religious riots in Egypt, the emperor <answer>Decius</answer> decreed that all subjects of the Empire must actively seek to benefit the state through witnessed and certified sacrifice to "ancestral gods" or suffer a penalty: only Jews were exempt. <answer>Decius</answer>' edict appealed to whatever common mos maiores might reunite a politically and socially fractured Empire and its multitude of cults; no ancestral gods were specified by name. The fulfillment of sacrificial obligation by loyal subjects would define them and their gods as Roman. Roman oaths of loyalty were traditionally collective; the Decian oath has been interpreted as a design to root out individual subversives and suppress their cults, but apostasy was sought, rather than capital punishment. A year after its due deadline, the edict expired.
Which emperor decreed that all Romans must sacrifice to traditional gods?
Decius