are sent usually by the Congregation of Propaganda to missionary countries. It has become customary however for the pontifical secretariate of state to send Apostolic delegates. purely ecclesiastical in character, to countries which have not diplomatic relations with the Holy See. Such delegates have been sent to the United States, Canada, the Philippines, Mexico, Cuba and Porto Rico.
If an Apostolic delegate is sent to a country in which diplomatic relations with the Holy See exist, then to his title is added that of envoy extraordinary. so that he may be accredited to the Government of the country. Such is the position of Apostolic delegates in the South American countries, Colombia, Peru, Bolivia, Ecuador, etc.
To Apostolic delegations, as to nunciatures, is attached a staff composed of an auditor and a secretary. In the absence of the Apostolic delegate or nuncio, the auditor takes his place with the title of chargé d'affaires.
Nuncios have a diplomatic character, in addition to their ecclesiastical mission. They are accredited to courts or governments, and they are granted special faculties according to the needs of the country to which they are sent, such faculties being conveyed in a special brief.
They are of the first or second-class according in part to the importance of the country to which they are accredited.
A nuncio, in addition to the staff described above, may also have a counsellor and an attaché.