Roman Catholic Diocese of Trier

Diocese of Trier or Treves Dioecesis Trevirensis Bistum Trier
Trier Cathedral
Coat of arms
Location
Country	Germany
Ecclesiastical province	Cologne
Statistics
Area	12,870 km2 (4,970 sq mi)
Population - Total - Catholics	(as of 2010) 2,468,000 1,504,500 (61%)
Information
Denomination	Catholic Church
Sui iuris church	Latin Church
Rite	Roman Rite
Established	1st Century
Cathedral	Cathedral of Trier
Patron saint	Mary, Mother of God Saint Matthias
Current leadership
Pope	Francis
Bishop	Stephan Ackermann Bishop of Trier
Metropolitan Archbishop	Rainer Maria Woelki
Auxiliary Bishops	Robert Brahm, Jörg Michael Peters
Map
Website
bistum-trier.de

The Diocese of Trier (Latin: Dioecesis Trevirensis), in English historically also known as Treves ([tɾivz]) from French Trèves, is a Latin Church ecclesiastical territory or diocese of the Catholic church in Germany.^[1][2] When it was the archbishopric and Electorate of Trier, it was one of the most important states of the Holy Roman Empire, both as an ecclesiastical principality and as a diocese of the church. Unlike the other Rhenish dioceses—including Mainz and Cologne–Trier was the former Roman provincial capital of Augusta Treverorum. Given its status, Trier has continuously been an episcopal see since Roman times and is one of the oldest dioceses in all of Germany. The diocese was elevated to an archdiocese in the time of Charlemagne and was the metropolitan for the dioceses of Metz, Toul, and Verdun. After the victory of Napoleon Bonaparte of France, the archdiocese was lowered to a diocese and is now a suffragan in the ecclesiastical province of the Archdiocese of Cologne. The diocesan cathedral is the Cathedral of Saint Peter. The Cathedral Chapter retains the right to elect the bishop, rather than selection by papal appointment.^[3]