It is the fourth largest city in Rhineland-Palatinate, after Mainz, Ludwigshafen and Koblenz.
The city, first called Augusta Treverorum but known from the second half of the 3rd century as Treveris, was founded over 2000 years ago. It claims to be the oldest city in Germany.
Trier bases its claim on the historical fact that the Romans called it a city, rather than a settlement or an army camp.
The following Roman monuments in Trier have been on the UNESCO World Heritage List since 1986
The “Barbara” thermal baths (Barbarathermen)
The Imperial thermal baths (Kaiserthermen)
The Aula Palatina known in German as the Konstantinbasilika
The Porta Nigra city gate
The Roman bridge (Römerbrücke)
St. Peter’s Cathedral