Volusianus, Rome mint, 251-253 AD., Æ Sestertius (23-28 mm / 15,30 g), bronze, axis about coin alignment ↑↓ (ca. 190°), Obv.: [I]MP CAE C VIB VOL[V]SIANO AVG , laureate, draped, and cuirassed bust right, seen from behind. Excellent portrait. Rev.: IVN[ONI MA]RTIALI / S - C , Iuno Martialis seated facing in domed tetrastyle temple and three steps, ornamented with garlands, peacock at her side. RIC vol. IV, part III, p.188, 252a ; Banti 12 ; C. 41 .
Ex Künker 115 (25 September 2006), 727
The Temple of Iuno Martialis was a circular building from the mid-3rd century AD whose exact location in Rome is unknown. The temple was probably built under the emperor Trebonianus Gallus (ruled from 251 to 253 AD). The temple is depicted on some of his coins and those of his son and co-ruler Volusianus. After that it was an open circular temple on a two-tiered podium with a statue of the goddess in its center. According to legend, the goddess Iuno, made pregnant by the scent of a flower, gave birth to the god Mars. Martialis is therefore used here as the epithet of Iuno.