Trajan's Forum stands as one of the most remarkable architectural achievements of Roman antiquity, illustrating the splendor of Rome at its peak. Constructed in the heart of the Eternal City, it extended the imperial fora of Caesar and Augustus, showcasing Roman engineering and artistic prowess. Commissioned after Trajan's victory over the Dacians in 106 CE, the forum was funded by the immense spoils of war, including vast amounts of gold, silver, and prisoners. Determined to surpass his predecessors, Trajan entrusted the design and construction to the renowned architect Apollodorus of Damascus, who employed thousands of laborers from across the empire to complete the project swiftly between 107 and 113 CE. Today, many elements of the forum, such as Trajan’s Column and the Basilica Ulpia, remain well-preserved, while others, like the triumphal arch marking the forum's entrance, have been lost.

The coinage of the period provides invaluable insight into the now-lost triumphal arch, which celebrated Trajan's victories. These coins offer a detailed depiction of the arch’s architecture, featuring six columns framing a central entrance, niches housing statues of deities and prisoners, and a roof adorned with an elaborate statuary group. This included a six-horse chariot flanked by warriors and symbols of military triumph. Such architectural depictions highlight Trajan's affinity for combining monumental architecture with numismatic artistry, as seen in his prolific issuance of coins celebrating his forum, the Basilica Ulpia, and other grand structures. These coins, struck between 112 and 115 CE, emphasized the emperor’s unparalleled achievements and the forum's symbolic role in glorifying his military success.

The Forum complex, dedicated in 112 CE, included several key structures: the Basilica Ulpia, the Column of Trajan, two libraries, and an expansive central square, all integrated with the adjacent Markets of Trajan and Forum Augustum. The forum's design and decoration emphasized Trajan’s military triumphs, contrasting with the peaceful ambiance of earlier forums like that of Vespasian. Its gilded statues, inscriptions, and other elements conveyed the message that Trajan's victories alone had financed this grand space. Later additions, such as a temple dedicated by Hadrian to the deified Trajan and his wife Plotina, further solidified its legacy as a monument to both his military achievements and his apotheosis.

Ancient accounts underscore the forum's unparalleled magnificence, describing it as unmatched even by divine standards. Beyond its architectural grandeur, the forum played a central role in Roman public life, hosting significant events such as the burning of state debt records and the display of laws. Its commemoration in coinage reflects its immense importance, as Trajan's military successes enabled the creation of Rome's most splendid public space. These coins, produced from the forum's dedication onward, served as enduring reminders of the emperor's accomplishments and the monumental legacy of the grandest imperial forum constructed during the Roman Empire.

Trajan (AD 98-117), AV Aureus, 7.32g, Rome, 115, laureate, draped and cuirassed bust right, imp traianvs avg ger dac p m tr p cos vi p p, rev. forvm traianvm, monumental entrance to Trajan's forum, with elaborate statuary with facing quadriga at centre on roof (RIC 256; BMC 509; C.168),

Ex. Munzen & Medallien AG Auction 28 lot 327 (June 19, 1964); Ex. Mazzini lot 168 (published 1957); Ex. Magnaguti III lot 86, June 26, 1950; Ex. Sir Arthur John Evans, Ars Classica XVII, Oct 13, 1934, lot 1365