Papal States, Ital. Lo Stato della Chiesa, from 754 to 1870 an independent territory under the temporal rule of the popes, also called the States of the Church and the Pontifical States. The territory varied in size at different times; in 1859 it included c.16,000 sq mi (41,440 sq km) extending north-south on the Italian peninsula, from the Adriatic Sea and lower course of the Po River to the Tyrrhenian Sea, thus including the present regions of Latium, Umbria, Marche, and eastern Emilia-Romagna.
