Caesar's Rhine bridges (bridge) built

54 BCE.

Shown on the map at 50.413°, 7.473°.

The first two bridges on record to cross the Rhine river were built by Julius Caesar and his legionaries during the Gallic War in 55 BC and 53 BC. Strategically successful, they are also considered masterpieces of military engineering.

Text from the Wikipedia article Caesar's Rhine bridges, licensed CC BY-SA 4.0.

Everything else in 54 BCE

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