Tags: Clerical Administrative Region, Diocese.
The Roman Catholic Diocese of Trebinje-Mrkan is an ecclesiastical territory or diocese of the Roman Catholic Church in eastern Herzegovina.It is the oldest and smallest Roman Catholic diocese of Bosnia and Herzegovina. The diocese was formed sometime before the year 1022. An exact date is not known but church officials decided to celebrate the diocese’s millennium in 1984 estimatiing its foundation at 984. The diocese has its episcopal see in the city of Trebinje.
