According to Wikipedia, Caracalla was emperor (IMPERATORE) of Rome from 198 to 217. The eldest son of Septimius Severus, for a short time he ruled jointly with his younger brother Geta until he had him murdered in 211. Caracalla is remembered as one of the most notorious and unpleasant of emperors because of the massacres and persecutions he authorized and instigated throughout the Empire.
You can find genuine ancient coins with Caracalla on them, but this is obviously a modern novelty piece produced for some type of promotion. This web site (click here) says it comes from a washing soap adverting campaign. The same site says that they were produced in gold as well, which is not very likely. A metaphysical site (click here) says the piece materialized from thin air. The pictured piece would be worth a few US dollars to collectors of such items.