AR24 - Severus Alexander L Ι

Alexandria's billon tetradrachms of this period reflect the mint's methodical regnal year system — this piece dates to year ΛΙ (year 11) of Severus Alexander's reign. The Egyptian provincial coinage operated almost entirely independently of Rome's denarius system, serving the closed currency economy Ptolemaic administrators had established centuries earlier and which Rome simply inherited and maintained.

By 230–231 AD, Severus Alexander was occupied with the emerging Sasanian threat following Ardashir I's campaigns into Roman Mesopotamia — a crisis that would ultimately define, and end, his reign.