Pius XI in the context of "Encyclical"

An ordinary (from Latin ordinarius) is an officer of a church or civic authority who by reason of office has ordinary power to execute laws.

Such officers are found in hierarchically organised churches of Western Christianity which have an ecclesiastical legal system. For example, diocesan bishops are ordinaries in the Catholic Church and the Church of England. In Eastern Christianity, a corresponding officer is called a hierarch (from Greek ἱεράρχης hierarkhēs "president of sacred rites, high-priest" which comes in turn from τὰ ἱερά ta hiera, "the sacred rites" and ἄρχω arkhō, "I rule").

A prisoner in the Vatican (Italian: Prigioniero nel Vaticano; Latin: Captivus Vaticani) or prisoner of the Vatican described the situation of the pope with respect to the Kingdom of Italy during the period from the capture of Rome by the Royal Italian Army on 20 September 1870 until the Lateran Treaty of 11 February 1929. Part of the process of the unification of Italy, the city's capture ended the millennium-old temporal rule of the popes over Central Italy and allowed Rome to be designated the capital of the new country. Although the Italians did not occupy the territories of Vatican Hill delimited by the Leonine walls and offered the creation of a city-state in the area, the popes from Pius IX to Pius XI refused the proposal and described themselves as prisoners of the new Italian state.

Rerum novarum, or Rights and Duties of Capital and Labor, is an encyclical issued by Pope Leo XIII on 15 May 1891. It is an open letter, passed to all Catholic patriarchs, primates, archbishops, and bishops, which addressed the condition of the working class. It discusses the relationships and mutual duties between labor and capital, as well as government and its citizens. Of primary concern is the need for poverty amelioration of the working class. It supports the rights of labor to form trade unions, and rejects socialism and laissez-faire capitalism, or unregulated, brutal capitalism, while affirming the right to private property and to a living wage.

A foundational text of modern Catholic social teaching, many of the positions in Rerum novarum are supplemented by later encyclicals, in particular Pius XI's Quadragesimo anno (1931), John XXIII's Mater et magistra (1961), Paul VI's Octogesima adveniens (1971), and John Paul II's Centesimus annus (1991), each of which commemorates an anniversary of the publication of Rerum novarum. It also inspired Catholic activism, and influenced distributists and supporters of corporatism. Socialists generally contest the encyclical's interpretation of socialism, and some socialists, particularly Catholic socialists, interpret Rerum novarum as not rejecting socialism, argue that divine law justifies the abolition of private property, and emphasize its anti-capitalist character.