Roman Catholic Diocese of Isiro–Niangara Tags: Clerical Administrative Region, Diocese.The Roman Catholic Diocese of Isiro–Niangara (Latin: Isiren(sis) – Niangaraën(sis)) is a diocese located in the city of Isiro–Niangara in the Ecclesiastical province of Kisangani in the Democratic Republic of the Congo. thumbnail area (km2) 6e+10 country Democratic Republic of the Congo jurisdiction Diocese Learn more... Loading...