In addition to his stable governance and successful military campaigns, which expanded the Roman Empire to its greatest territorial extent, Emperor Trajan is renowned for his social welfare initiatives and ambitious public building projects that reshaped Rome. Among the structures associated with his reign is the Temple of Jupiter Victor, featured on the reverse of some of his coinage. This temple, dedicated to Jupiter as the "giver of victory," was situated on the Palatine Hill and symbolized Rome's military successes. Although Trajan did not restore or modify the temple, its depiction on his coins likely celebrated his recent victories over the Dacians, emphasizing his role as a triumphant military leader.

The Temple of Jupiter Victor has a storied history, originally vowed by Q. Fabius Maximus Rullianus in 295 BCE during the Battle of Sentinum and dedicated shortly thereafter in either 294 or 293 BCE. It likely underwent significant damage, possibly during the great fire of 80 CE, before being restored and expanded by Emperor Domitian, who also commemorated it in his coinage. By Trajan’s time, the temple stood as a grand Corinthian-style structure with an octastyle façade, side colonnades, and a monumental statue of Jupiter within. While Trajan’s use of this imagery on his coinage does not correlate with specific work on the temple, it serves as part of a broader decennalian theme celebrating Rome’s martial triumphs under his leadership.

Later emperors made further modifications to the temple. During the reign of Elagabalus, the temple's front courtyard was adorned with a propylaea, and the structure was rededicated to the sun god Sol El Gabal. It was eventually re-dedicated once more to Jupiter Ultor under Severus Alexander. Despite these changes, the temple retained its historical and symbolic significance, representing Rome’s enduring association with victory and divine favor across centuries.

Trajan, 98 – 117 As circa 107-108, Æ 9.40 g. IMP CAES NERVAE TRAIANO AVG GER DAC P M TR P COS V P P Laureate head r., drapery on l. shoulder. Rev. S P Q R OPTIMO PRINCIPI Octastyle temple with portico on either side; at centre, architrave adorned with figure of Jupiter and other figures; on roof, figure holding spear between two Victories. In exergue, S C. C 550 var. (without drapery). BMC 958. RIC 577 var. (without Jupiter seated at centre). CBN 355. Woytek 307b (this coin cited) and Woytek 306b (dupondius, this reverse die).

Ex Hess, 6 January 1926, Löbbecke, 1151 and Lanz 109, 2002, 398 sales.