. "The denier was a medieval coin which takes its name from the Frankish coin first issued (as the denarius) in the late seventh century; in English it is sometimes referred to as a silver penny. Its appearance represents the end of gold coinage, which, at the start of Frankish rule, had either been Byzantine or \"pseudo-imperial\" (minted by the Franks in imitation of Byzantine coinage). Silver would be the basis for Frankish coinage going forward."@en . .