The Roman Catholic Diocese of Trebinje-Mrkan is an ecclesiastical territory or diocese of the Roman Catholic Church in eastern Herzegovina.
* Diocese of Trebinje e Mrkan
* Diocese of Trebinje
8 July 1890., United From: Diocese of Mostar-Duvno & Diocese of Trebinje e Mrkan To Diocese of Mostar-Duvno (-Trebinje e Mrkan)
It depicts the nation's divisions into bishoprics in the Catholic Church.
Vrhbosna Archbishopric - Red
Banja Luka Bishopric - Gray
Mostar-Duvno Bishopric - Blue
Trebinje Bishopric - Light Blue
The diocese has its episcopal see in the city of Trebinje. However, from 1361 to 1391 it was relocated to the island of Mrkan, thus taking on the present double name.
In 1890, the diocese was united with the much larger Diocese of Mostar-Duvno. Since then it has been administered by Mostar-Duvno's bishop (currently Ratko Perić). However, unlike the rest of the Mostar-Duvno territory, Franciscan priests are not appointed to parishes in Trebinje-Mrkan, as the Franciscan custody does not extend into this region.
On May 1, 1984 the Church of the Birth of Mary in Trebinje was made a cathedral by decree. This came to coincide with a symposium held that year under the leadership of Bishop Pavao Žanić to study the historical and pastoral significance of the diocese.
One of the most important parishes in the bishopric is the Shrine of the Queen of Peace in Hrasno. Every year thousands gather to celebrate the parish's feast day.
* Anselmus (Nicolaus) Cattich (a Ragusa), O.F.M. † (15 Dec 1760 Appointed - 24 Jan 1792 Died)
* Nikolaj Ferrich † (26 Mar 1792 Appointed - 30 May 1819 Died)
Affiliated Bishops, Living
* Petar Antun Rajič (Priest: 29 Jun 1987 to 2 Dec 2009)
Affiliated Bishops, Deceased
* Franciscus Hieronymus Bona †
* Anselmus (Nicolaus) Cattich (a Ragusa), O.F.M. † (Bishop: 15 Dec 1760 to 24 Jan 1792)
* Nikolaj Ferrich † (Bishop: 26 Mar 1792 to 30 May 1819)