4th century Rome... fake. You didn't say it had to be authentic. Festival of Isis. Anonymous AE3 Anonymous Issue for the Festival of Isis, AE3, 4th Century, Rome. DEO SARAPIDI, Jugate, draped busts of Serapis right wearing modius and Isis wearing hem-hem crown / VOTA-PVBLICA, Isis riding hound. Next: Your best fake.