7 Nor must We omit to mention that during this period there were duly established in different regions five Apostolic Delegations, which are under the jurisdiction of the Sacred Congregation of Propaganda Fide; moreover Apostolic Nuncios or Internuncios have been appointed to a number of missionary territories. In this connection it may be asserted that the presence and activity of these prelates have borne abundant fruit. It is their special merit that greater coordination and collaboration have been realized among missionaries who are working toward a common end, Our Legates likewise have contributed considerably to this result. They often visit each district and also from time to time take part in Our name in meetings of the Hierarchy during which the experiments which have been prudently tried out by different local Ordinaries are pooled to the common advantage, and by common agreement easier and more efficient methods of apostolate have been adopted. Besides, this fraternal coordination of the activities of the faith has also been conducive to a better appreciation of the Catholic religion on the part of public authorities, even when they are non-Catholic.
Source: Evangelii Praecones (Vatican.va)