Antike - UNESCO World Heritage
Konstantinbasilika (Basilica of Constantine)
Innenstadt (Old Town) · Free admission · Apr-Okt Mo-Sa 10-18, So 13-18; Nov-Mar verkuerzt

The Aula Palatina was the throne hall of the late Roman emperor Constantine. At 67 m long, 27 m wide, and 33 m high, it is one of the largest surviving single-room buildings of antiquity. Today it serves as the Protestant Church of the Redeemer, with services held every Sunday inside the ancient hall.
More in Innenstadt (Old Town)

Innenstadt (Old Town)
Porta Nigra (the Black Gate)
The Black Gate, Trier's landmark and the best-preserved Roman city gate north of the Alps.
From 4 €

Innenstadt (Old Town)
Trier Cathedral (Dom St. Peter)
Germany's oldest bishop's church. Home to the Holy Robe, the cathedral treasury, and Romanesque mass right on the Hauptmarkt (the main market square).
Free admission

Innenstadt (Old Town)
Liebfrauenkirche (Church of Our Lady)
One of the oldest Gothic churches in Germany, right next to the cathedral.
Free admission