We had a good thread on Caracalla a while back: https://www.cointalk.com/threads/my-favorite-roman-portrait-caracalla.323539/ The thrust of this thread is different -- first-year coins. Until 215 under Caracalla the denarius was the silver denomination. (There were extremely few silver quinarius pieces which hardly count.) In 215 the "antoninianus" (which is our name for it. It is not know what the ancients called it) was introduced. It weighs about 1 1/2 times the weight of a denarius, but scholars now think it was tariffed at two denarii, making it overvalued relative to the denarius. Two denarii had more silver than one two-denarius piece. Here is one from the first year of issue: 22 mm. 4.90 grams. ANTONINVS PIVS AVG GERM (He called himself "Antoninus Pius" but we call him Caracalla.) Radiate bust of Caracalla right, cuirassed and seen patly from behind. The radiate crown distinguishes the denomination. PM TRP XVIII COS IIII PP Jupiter standing right, head right, holding thunderbolt (which tells us it is Jupiter) and a long staff. TRP XVIII was 215 and dates the coin. There are no antoniniani dated earlier. There is something to like about first-year-of-issue coins. This one is from the first year of a common denomination which changed greatly over the course of the third century. I like portrait pieces from the first (and last) year of an emperor's reign. How young did he look at the beginning? How much did the emperor's portrait change over his reign? Show us a first-year coin type or portrait, maybe with a last-year for comparison. Or, show us another Caracalla.