In the secret Vatican archives and in other archives of the Holy See, there is a very rich and varied archival material of the greatest importance for the history of all peoples and countries of the world, ecclesiastical and general. This archival material was created by the millennial activity of the papacy or the Holy See which, through various institutions and their respective offices, managed and still manages different levels of authority: Roman Diocese, the province of central and southern Italy, Western or Roman patriarchy, the Catholic Church all over the world and, finally, once in a rather large, now miniature, papal state in Italy. It is understandable, then, that archival material that was created there, necessarily very diverse, and its organic structure itself, regardless of the accommodation and condition of order is very intricate. Propaganda archive, this precious mine of data for the church and general history of many nations of the world, including those in the Balkans who at the time of their founding (1622) and in the first centuries of the activity of this institution were under Turkish rule or bound with the Turkish state. The Propaganda archive was not included in the Vatican, but is still entirely under the direct management of that choir. It is understandable that managing of the archival material in this archive is simpler and easier than in the Vatican archive because here is kept archival material of only one, even though so important, institution with a broad range of activities, the Vatican archive brings together many different types of funds, actually special archives of various papal institutions over a period of over a thousand years.