The Electorate of Trier (German: Kurfürstentum Trier or Kurtrier), traditionally known in English by its French name of Trèves, was an ecclesiastical principality of the Holy Roman Empire that existed from the end of the 9th to the early 19th century. It consisted of the temporal possessions of the prince-archbishop of Trier (Erzbistum Trier), also a prince-elector of the empire, along with the Elector of Cologne and the Elector of Mainz, among which the latter ranked first.
