Arch of Tiberius

Standing somewhere between the Temple of Saturn and the Basilica Julia, near the busy Vicus Jugarius at the heart of the Roman Forum, there was once an arch that only one ancient writer thought worth mentioning. It was erected in AD 16, approached by a flight of steps, flanked by Corinthian columns, and built to announce one of the most politically loaded victories in the early empire. Today there is nothing left of it but a plaque, some buried foundations, and a single passage in Tacitus.

The Arch of Tiberius commemorated the recovery of the eagle standards — the aquilae — lost by the general Publius Quinctilius Varus at the Battle of Teutoburg Forest in AD 9. Those standards were not merely military insignia. Each legion’s eagle was a sacred object, carried by a specially designated bearer, associated with Jupiter, and understood to embody the collective honor of the unit. Losing one was a disgrace of the gravest kind. Losing three at once was a catastrophe that shook the Augustan regime to its foundations. The man responsible was Arminius, a Cheruscan chieftain who had served in the Roman auxilia and knew Roman tactics from the inside. He led a coalition of Germanic tribes in a devastating ambush that annihilated Legions XVII, XVIII, and XIX, forcing Varus to fall on his own sword. The Rhine became Rome’s working eastern frontier, and large-scale ambitions for Germanic conquest died with Varus’s legions.

Seven years later, Tiberius’s adopted son Germanicus launched punitive campaigns across the Rhine and succeeded in recovering two of the three lost eagles. The arch went up the following year to mark the achievement. Its inscription, as Tacitus records in the Annals (II.41), named the recovery as won “under the leadership of Germanicus, the auspices of Tiberius.” That careful formula tells us everything about how power worked under the early Principate. Germanicus had commanded the campaign. Tiberius received the monument. By this point in the empire, only the emperor or a member of the imperial family could celebrate a formal triumph; military glory belonged, constitutionally, to the dynasty. Germanicus did celebrate a triumph in AD 17 — the last time anyone other than a reigning emperor would ever do so — but the permanent stone record in the Forum named his uncle.

What the arch commemorated was also, quietly, incomplete. Only two of the three eagles were recovered. The campaigns east of the Rhine achieved no lasting territorial gain. Tacitus, who devotes considerable space in the early books of the Annals to Germanicus’s German operations, makes plain his view that the war was inconclusive, costly, and eventually abandoned at Tiberius’s insistence. The arch was, in this sense, a characteristic piece of Julio-Claudian monumental rhetoric: a complicated military reality rendered as unambiguous public fact.

We know what the arch looked like only because it appears, small and schematic, in a relief frieze on the Arch of Constantine: a single bay, Corinthian columns, similar in profile to the Arch of Titus. Its physical disappearance is total.

FURTHER READING

1. Low, Katie. “Germanicus On Tour: History, Diplomacy And The Promotion Of A Dynasty.” The Classical Quarterly, vol. 66, no. 1, 2016, pp. 222–38. JSTOR, http://www.jstor.org/stable/43905744. Accessed 18 July 2026.
2. Richardson, L., Jr. A New Topographical Dictionary of Ancient Rome. Johns Hopkins University Press, 1992. [Source: Johns Hopkins UP]
3. Pelling, Christopher. “TACITUS AND GERMANICUS.” Tacitus and the Tacitean Tradition, edited by T. J. Luce and A. J. Woodman, Princeton University Press, 1993, pp. 59–85. JSTOR, http://www.jstor.org/stable/j.ctt7ztggx.9. Accessed 18 July 2026.
4. Shotter, D. C. A. “Tacitus, Tiberius and Germanicus.” Historia: Zeitschrift Für Alte Geschichte, vol. 17, no. 2, 1968, pp. 194–214. JSTOR, http://www.jstor.org/stable/4435025. Accessed 18 July 2026.
5. Wells, Peter S. The battle that stopped Rome: Emperor Augustus, Arminius, and the slaughter of the legions in the Teutoburg Forest. WW Norton & Company, 2003.