Administrative subdivisions of the Papal States from 1816 to 1870

Between the Congress of Vienna (1815) and the capture of Rome (1870), the Papal State was subdivided geographically into 17 apostolic delegations (delegazioni apostoliche) for administrative purposes. These were instituted by Pope Pius VII in a motu proprio of 6 July 1816: "Quando per ammirabile disposizione".

Source: Wikipedia — Administrative subdivisions of the Papal States from 1816 to 1870 (CC BY-SA 4.0)