The aurelianianus (plural: aruelianiani) was a silvered (silver plated) radiate denomination introduced by Aurelian in 274 A.D. and struck until 293 A.D. After 274 the older radiate Antoniniani no longer circulated. The aurelianianus was struck on the same weight standard as the antoninianus, 3.88 grams, but with a copper core and a 5% silver coating, and was tariffed at 5 denarii communes (d.c.). Many aurelianianus have lost their silvering and appear bronze today. Many of the later aurelianianus were struck with value marks, XXI or KA (Greek), indicating a value of 20 sestertii = 1 aurelianianus. Most references and dealer catalogs do not distinguish the aurelianianus from the earlier radiate denomination, the antoninianus. Both terms, antoninianus and aurelianianus are modern terms. The names used by the Romans for the denominations are unknown.