This coin dates back 1700 years to the years 313-318AD. Valerius Licinianus Licinius (Greek: Λικίνιος ; c. 265 – 325) was Roman emperor from 308 to 324. For most of his reign, he was the colleague and rival of Constantine I, with whom he co-authored the Edict of Milan that granted official toleration to Christians in the Roman Empire.