The Papal State(s), the State(s) of the Church, the Pontifical States, the Ecclesiastical States, or the Roman States (Italian: Stato Pontificio, also Stato della Chiesa, Stati della Chiesa, Stati Pontifici, and Stato Ecclesiastico; Latin: Status Pontificius, also Dicio Pontificia)[1] were among the major historical states of Italy from roughly the 6th century until the Italian Peninsula was unified in 1861 by the Kingdom of Piedmont-Sardinia (after which the Papal States, in less territorially extensive form, continued to exist until 1870).
The Papal States comprised territories under direct sovereign rule of the papacy, and at its height it covered most of the modern Italian regions of Romagna, Marche, Umbria and Lazio. This governing power is commonly called the temporal power of the Pope, as opposed to his ecclesiastical primacy.
The plural Papal States is usually preferred; the singular Papal State (equally correct since it was not a mere personal union) tends to be used (normally with lower-case letters) for the modern State of Vatican City, an enclave within Italy's national capital, Rome. The Vatican City was founded in 1929, again allowing the Holy See the political benefits of territorial sovereignty.
The following are images from various Vatican City-related articles on Wikipedia.
Image 1View of St. Peter's Square from the top of Michelangelo's dome (from Vatican City)
Image 2Pope Pius XI decree and conferment of Saint Therese of France to be Patroness of the gardens. The Leonine walls, 17 May 1927. (from Gardens of Vatican City)
Image 15A monument to Fr. Maximilian Kolbe, among the estimated 3,000 members (18%) of the Polish clergy who were killed by the Nazis; of these, 1,992 died in concentration camps. (from Vatican City during World War II)
Image 16Map of Vatican City, highlighting notable buildings and the Vatican gardens (from Vatican City)
Image 41The Italian peninsula in 1796. The Papal States in central Italy are coloured purple. (from Vatican City)
Image 42The Seal of Vatican City. Note the use of the Italian language. (from Vatican City)
Image 43The Apostolic Palace (Palazzo Apostolico), the official residence of the Pope. Here, Benedict XVI is at the window marked by a maroon banner hanging from the windowsill at centre. (from Vatican City)
... that the Vatican selected Mary Milligan in 1987 to be one of only three U.S. experts to assist the International Synod of Bishops on the Laity in Rome?
^The name finally settled upon for the project was chosen by journalist Franco Franchi after World War II; Delli, Sergio (1975). Le strade di Roma. Rome: Newton & Compton. p. sub vocem.