A medieval inscription on the façade of the Red House in Trier market stated: Trebeta's parents were said to have been Ninus, a legendary "King of Assyria" invented by the ancient Greeks (first mentioned by Ctesias), and an unknown mother who was Ninus's wife before Semiramis.
The Archbishop-Elector also had great significance as one of the seven electors of the Holy Roman Empire.
The University of Trier, the administration of the Trier-Saarburg district and the seat of the ADD (Aufsichts- und Dienstleistungsdirektion), which until 1999 was the borough authority of Trier, and the Academy of European Law (ERA) are all based in Trier.
It is one of the five "central places" of the state of Rhineland-Palatinate.
Over the time it has been ranked as high as 2 400 599 in the world, while most of its traffic comes from Germany, where it reached as high as 151 755 position.