 immediately dependent upon the Holy See (notably the Roman Congregation for the Evangelization of Peoples), not part of any ecclesiastical province (such as the Metropolitan Archbishopric of Addis Abbeba).Its cathedral episcopal see is the St. Joseph Cathedral, in Gambela.The Apostolic Vicariate of Gambella comprises all the Gambella Region and large part of Illubabor Zone in Oromia Region.