Coat of arms
The Bishopric and Archbishopric of Trier was one of the important ecclesiastical principalities of the Holy Roman Empire. Unlike the other Rhenish archbishoprics — Mainz and Cologne — Trier, as the important Roman provincial capital of Augusta Treverorum, had been the seat of a bishop since Roman times. It was raised to archiepiscopal status during the reign of Charlemagne, whose will mentions the bishoprics of Metz, Toul and Verdun as its suffragans.

History
The early bishops in this list are strictly legendary. The earliest authenticated bishop, according to the Catholic Encyclopedia (1908), was Agricius, who took part in the Council of Arles in 314, but who does not appear among the traditional list.
Bishops and Archbishops

Eucherius c. 50–73
Valerius of Trèves, c.73–88 Archbishops of Trier, 791–1189

John I 1189–1212
Theodoric II 1212–42
Arnold II von Isenburg 1242–59
Heinrich I von Finstingen 1260–86
Bohemond I von Warnesberg 1286–99
Diether von Nassau 1300–07
Heinrich III von Virneburg 1300–06 (in opposition)
Baldwin von Luxemburg 1307–54
Bohemond II von Saarbrücken 1354–61
Kuno II von Falkenstein 1362–88
Werner von Falkenstein 1388–1418
Otto von Ziegenhain 1418–30
Rhaban von Helmstadt 1430–38
Jakob von Sierk 1439–56
Johann II of Baden 1456–1503
Jakob II of Baden 1503–11
Richard Greiffenklau zu Vollraths 1511–31
Johann III von Metzenhausen 1531–40
Johann Ludwig von Hagen 1540–47
Johann IV von Isenburg 1547–56
Johann V von der Leyen 1556–67
Jakob III von Eltz 1567–81
Johann VI von Schonenberg 1581–99
Lothar von Metternich 1599–1623
Philipp Christoph von Sotern 1623–52
Karl Kaspar von der Leyen 1652–76
Johann Hugo von Orsbeck 1676–1711
Charles Joseph of Lorraine 1711–15
Franz Ludwig of Palatinate-Neuburg 1716–29
Franz Georg von Schönborn-Buchheim 1729–56
Johann Philipp von Walderdorf 1756–68
Clemens Wenzel of Saxony 1768–1803 Archbishop-Electors of Trier, 1189–1803

Charles Mannay 1802–16
Josef von Hommer 1824–36
Wilhelm Arnoldi 1842–64
Leopold Pelldram 1864–67
Matthias Eberhard 1867–76
Michael Felix Korum 1881–1921
Franz Rudolf Bornewasser 1922–51
Matthias Wehr 1951–66
Bernhard Stein 1967–80
Hermann Josef Spital 1981–2001
Reinhard Marx 2001–present Notes

History of Trier