The GENIO type is a common reverse and was issued by the Tetrarchic emperors for over a decade, but the seemingly peaceful scene depicted on the reverse was very contentious for many people in the years A.D. 303- 313.
During this period, Christians were persecuted and many were killed because of what was depicted on the reverse. The design was modeled after a statue of the Spirit of the Roman People (GENIO POPVLI ROMANI) which used to stand in the Roman forum. The reverse on the coin below depicts Genius holding a patera and pouring a libation over an altar.
Diocletian feared that Christians were weakening the Empire and in A.D. 303 declared that everyone must perform public sacrifices to demonstrate their loyalty to the Emperor and Rome. This was really just a conservative move to reaffirm traditional civic virtues. The act depicted on the reverse of the GENIO coin was one that Roman citizens were expected to perform; but many Christians refused and were martyred. The persecution was firmly enforced in the Eastern Empire, less so in the West. The persecution officially ended in A.D. 313.
Something to think about the next time that you see a common GENIO coin.
