It appears from certain articles of Praedicate Evangelium that the competence of promoting evangelisation ministry of Eastern Churches belongs exclusively to the Dicastery for Oriental Churches. However, from some other articles, it appears that the Dicastery for Evangelisation also has competence in promoting that ministry of Eastern Churches, suggesting overlapping of competence. This study explores the competence of both those dicasteries and comes to the conclusion that the competence of the Dicastery for Evangelisation over Eastern Churches is exercised together with the Oriental Dicastery, to which belongs the general competence of promoting evangelisation ministry of Eastern Churches.

Keywords: competence; Dicastery for Eastern Churches; Dicastery for Evangelisation; Eastern Churches; Evangelisation; Latin Church; mission territory; Praedicate Evangelium; Roman Apostolic See.