Licinius I / Sol - Follis - 20mm Arles mint 315-6 AD RIC 59 Alternately ally and adversary of Constantine was Licinius (Augustus 308-324 AD). Licinius controlled the East but was represented also on coins from Constantine's western mints. IMP LICINIVS PF AVG is just one of several legend varieties found for this ruler but all will include the title Augustus. Sol, the unconquerable sun god and comrade of the emperor (SOLI INVICTO COMITI), was most popular in the years immediately preceding the conversion of the Empire to Christianity. He is shown as a nude male wearing a radiate crown and holding a globe. The mintmark PARL combines the workshop letter P (primus) and the first three letters of the mint name. Code letters in the field (here SF) identify the issue (therefore date) of the coins. While some mint/issue combinations are rare and desired by specialists, Sol coins are generally very common. Douglas Smith