Roman Empire Follis Constantine I. (307/10-337 AD). Æ follis Siscia, A.D. 315/6. Obverse: IMP CONSTANTINVS P F AVG. Laureate head of Constantine I right. Reverse: IOVI CON-SERVATORI Jupiter standing facing head left holding Victory on globe and resting on scepter; at feet to left eagle standing left head right holding wreath in beak; A//·SIS·. RIC 15.