The Diocese of Aachen is one of 27
diocese
In church governance, a diocese or bishopric is the ecclesiastical district under the jurisdiction of a bishop.
History
In the later organization of the Roman Empire, the increasingly subdivided provinces were administratively associa ...
s in
Germany
Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...
and one of the six dioceses in the
ecclesiastical province
An ecclesiastical province is one of the basic forms of jurisdiction in Christian Churches with traditional hierarchical structure, including Western Christianity and Eastern Christianity. In general, an ecclesiastical province consists of seve ...
of
Cologne
Cologne ( ; german: Köln ; ksh, Kölle ) is the largest city of the German western state of North Rhine-Westphalia (NRW) and the fourth-most populous city of Germany with 1.1 million inhabitants in the city proper and 3.6 millio ...
. The incumbent bishop is
Helmut Dieser, who was appointed by
Pope
The pope ( la, papa, from el, πάππας, translit=pappas, 'father'), also known as supreme pontiff ( or ), Roman pontiff () or sovereign pontiff, is the bishop of Rome (or historically the patriarch of Rome), head of the worldwide Cathol ...
Francis on 23 September 2016. The bishop's seat is
Aachen.