Skip to main content

Primary sourceArtifact103–105 AD

Trajan's Bridge over the Danube

Apollodorus of Damascus · 103–105 AD

A massive arch bridge built by Apollodorus of Damascus for Trajan's second Dacian war, once the longest arch bridge in the world.

Trajan commissioned this bridge for his second Dacian war, showing the engineering backbone of his military campaigns.

Ask Trajan about this sourceView the original(opens in new tab)
A modern wooden lattice structure with arched beams rests on two large rectangular stone pillars, set on a paved plaza with benches and grass. Trees, a white building, and a blue-roofed structure are in the background under a cloudy sky.
Trajan's Bridge over the Danube, by Apollodorus of Damascus, 103–105 AD. Remains at Drobeta-Turnu Severin, Romania, and Kladovo, Serbia.

About this source

What it is

Trajan's Bridge over the Danube was built between 103 and 105 AD by Apollodorus of Damascus for Trajan's second Dacian war. Only its stone pillars survive today, standing on the Romanian and Serbian sides of the river near Drobeta-Turnu Severin and Kladovo. The bridge's original appearance is also known from its depiction on Trajan's Column.

Why it matters

For over a thousand years this was the longest arch bridge ever built, a remarkable feat of Roman engineering made possible by Apollodorus's skill. It shows how Trajan's military ambitions in Dacia drove innovations in construction that outlasted the empire itself.

Look closer

  • Why might Trajan have needed such an ambitious bridge for his campaign?
  • What does the survival of only the pillars tell you about how much time has passed?
  • How does comparing the bridge's depiction on the Column with its real remains help historians?

This artifact is part of the curated material that grounds the AI version of Trajan on Humy.ai — when students ask about related events, the AI can quote it and cite it.

More Trajan sources

Meet the AI Trajan →
Tall marble Trajan's Column in Rome, a fluted column with spiral relief bands, topped by a bronze statue on a balcony platform. Behind it is a domed church with a lantern and tall buildings under a clear blue sky.Sculpture

Primary source

Trajan's Column

Apollodorus of Damascus · 113 AD

Plan drawing of the Imperial Fora in Rome. Labeled features include Trajan's Forum, Trajan's Column, Basilica Ulpia, Temple of Trajan, Libraries, Markets of Trajan, Forum of Augustus, Forum of Nerva, Temple of Peace, Forum of Caesar, and Curia, with a scale bar in metres and feet.Artifact

Primary source

Trajan's Forum

Apollodorus of Damascus · c. 100-113 AD

Plain red cloth book cover with fine vertical ribbed texture and a darker spine edge on the left side. No title or text is visible.Speech

Primary source

Panegyricus

Pliny the Younger · c. 100 AD

Front view of the Arch of Trajan in Benevento, a white marble Roman triumphal arch with carved relief panels and a long inscription on the attic, under a clear blue sky. Tourists stand on the paved square at left, and a tour bus and a small rounded shrub are visible on the right.Artifact

Secondary source

Arch of Trajan at Benevento

114-117 AD

Marble head sculpture of a man with short, combed, curled hair over the forehead, a stern brow, a straight nose, and a slight closed-mouth expression. The head rests on a plain base against a brick-colored wall.Sculpture

Primary source

Portrait of Trajan

Ready when you are

Start chatting with Trajan now.

20 messages free · No credit card · Available in 50+ languages.

Trial Humy for freeGet a quote for institutions