Papal collectors recovered monies due from the clergy to the Apostolic Chamber and in the late Middle Ages were an important factor in the communication between the Papacy and the Church as a whole, particularly as in some countries they assumed the functions of diplomatic representatives. The study examines all aspects of collectorship including a comparison of the financial revenue it yielded it different European countries. The volume also includes a prosopographic study of the collectors and sub-collectors in the German-speaking areas of Europe, complete with bibliographic references on the members of this group.