Konstantinbasilika
The Basilica of Constantine is the largest surviving single-room Roman structure, originally Emperor Constantine's throne hall. Entry is free.
Monument in Trier
Kaiserthermen (Imperial Baths)
These massive 4th-century Roman bath ruins include underground service tunnels you can walk through. A combined ticket covering multiple Roman sites keeps costs low. The sheer scale of the heating systems and pools reveals how seriously Romans took their bathing.
Nearby
More in Trier
Other places worth the walk, and what each one costs.
Porta Nigra
The best-preserved Roman city gate north of the Alps stands in dark sandstone at the entrance to Trier's pedestrian zone. Viewing it from outside is free and impressive enough on its own.
Trier Cathedral (Dom St. Peter)
Germany's oldest cathedral combines Roman foundations, Romanesque arches, and Gothic vaults in a single building. Entry is free.
Working out what Trier costs?
The whole of Trier