The offered denarius is dated on the basis of the titularity of the obverse, dating back to the reign of Severus Alexander between 222 AD (the beginning of independent rule) and 228 AD. The reverse legend, CONCORDIA without the addition of e.g. MILITVM, is quite rare in Roman coinage, although it is still certified on denarii, among others Septimius Severus. This legend, as well as the style of the coin, clearly indicates Antioch as the place of mintage.
Roman Imperial
Severus Alexander (222-235), Denarius 222-228, Antioch mint
Obverse: laureate bust right
IMP SEV ALEXAND AVG
Reverse: Concordia seated left on throne, holding cornucopia and patera
CONCORDIA
Weight 3,27 g.
Alexander Severus, whose real name is Gessius Bassianus Alexianus, was born in 208 AD in Caesarea, Phenicia. He was the son of Julia Mamea and Gessius Marcianus, a prosecutor of Syrian origin. He was adopted by Elagabal's cousin on May 10, 221 AD. When the latter was murdered on March 13, 222 AD, Alexander Sever was elected his successor. He remained under his mother's influence until the end of his reign. In 225 AD he married Orbiana. The emperor and his mother were murdered in 235 AD.