Pope Pius IX in the context of "Mortara case"

The Holy See exercised temporal power, as distinguished from its spiritual and pastoral activity, while the pope ruled the Papal States in central Italy. The Papal States ceased to exist following the capture of Rome in 1870 by the Royal Italian Army, after which its remaining territories were annexed to the Kingdom of Italy. The Lateran Treaty of 1929 later established the Vatican City, a small city-state where the Holy See currently exercises temporal powers.

According to the canonical Gospels, Joseph was a 1st-century Jewish man of Nazareth who was married to Mary, the mother of Jesus, and was the legal father of Jesus.

Joseph is venerated as Saint Joseph in the Catholic Church, Eastern Orthodox Church, Oriental Orthodox Church, Anglicanism and Lutheranism. In Catholic traditions, Joseph is regarded as the patron saint of workers and is associated with various feast days. The month of March is dedicated to Saint Joseph. Pope Pius IX declared him to be both the patron and the protector of the Catholic Church, in addition to his patronages of the sick and of a holy death, due to the belief that he died in the presence of Jesus and Mary. Joseph has become patron of various dioceses and places. Being a patron saint of virgins, he is venerated as "most chaste". The veneration of the pure and most Chaste Heart of Joseph has, in contrast to the Most Sacred Heart of Jesus and the Immaculate Heart of Mary, no liturgical cultus, but is a private devotion.

The First Ecumenical Council of the Vatican, commonly known as the First Vatican Council or Vatican I, was the 20th ecumenical council of the Catholic Church, held three centuries after the preceding Council of Trent which was adjourned in 1563. The council was convoked by Pope Pius IX on 29 June 1868, under the rising threat of the Kingdom of Italy encroaching on the Papal States. It opened on 8 December 1869 and was adjourned on 20 September 1870 after the Italian Capture of Rome. Its best-known decision is its definition of papal infallibility.

The council's main purpose was to clarify Catholic doctrine in response to the rising influence of the modern philosophical trends of the 19th century. In the Dogmatic Constitution on the Catholic Faith (Dei Filius), the council condemned what it considered the errors of rationalism, anarchism, communism, socialism, liberalism, materialism, modernism, naturalism, pantheism, and secularism.

Papal infallibility is a dogma of the Catholic Church (both the Latin and Eastern Catholic churches) which states that, in virtue of the promise of Jesus to Peter, the Pope when he speaks ex cathedra is preserved from the possibility of error on doctrine "initially given to the apostolic Church and handed down in Scripture and tradition". It does not mean that the pope cannot sin or otherwise err in many cases. This doctrine, defined dogmatically at the First Vatican Council of 1869–1870 in the document Pastor aeternus, is claimed to have existed in medieval theology and to have been the majority opinion at the time of the Counter-Reformation.

The doctrine of infallibility relies on one of the cornerstones of Catholic dogma, that of papal supremacy, whereby the authority of the pope is the ruling agent as to what are accepted as formal beliefs in the Catholic Church. The use of this power is referred to as speaking ex cathedra. "Any doctrine 'of faith or morals' issued by the pope in his capacity as successor to St. Peter, speaking as pastor and teacher of the Church Universal [Ecclesia Catholica], from the seat of his episcopal authority in Rome, and meant to be believed 'by the universal church,' has the special status of an ex cathedra statement. Vatican Council I in 1870 declared that any such ex cathedra doctrines have the character of infallibility (session 4, Constitution on the Church 4)."

The Latin Patriarchate of Jerusalem (Latin: Patriarchatus Latinus Hierosolymitanus) is the Latin Catholic ecclesiastical patriarchate in Jerusalem, officially seated in the Church of the Holy Sepulchre. The Latin patriarch of Jerusalem is the archbishop of Latin Church Catholics of the Archdiocese of Jerusalem with jurisdiction for all Latin Catholics in Israel, Palestine, Jordan and Cyprus; he also holds the office of grand prior of the Order of the Holy Sepulchre. It is exempt, being directly subject to the Holy See (and exceptionally its Dicastery for the Eastern Churches, which normally handles Eastern Catholics). It is not within an ecclesiastical province, and has no metropolitan functions.

The Patriarchate was originally established in 1099, with the Kingdom of Jerusalem encompassing the territories in the Holy Land newly conquered by the First Crusade. From 1374 to 1847 it was a titular see, with the patriarchs of Jerusalem being based at the Basilica di San Lorenzo fuori le Mura in Rome. Pope Pius IX re-established a resident Latin patriarch in 1847.

Our Mother of Perpetual Succour (Latin: Nostra Mater de Perpetuo Succursu), colloquially known as Our Lady of Perpetual Help), is a Catholic title of the Blessed Virgin Mary associated with a 15th-century Byzantine icon and a purported Marian apparition. The image was enshrined in the Church of San Matteo in Via Merulana from 1499 to 1798 and is today permanently enshrined in the Church of Saint Alphonsus of Liguori in Rome, where the novena to Our Mother of Perpetual Help is prayed weekly.

Pope Pius IX granted a pontifical decree of canonical coronation along with its official formalized title Nostra Mater de Perpetuo Succursu on 5 May 1866. The Latin Patriarch of Constantinople, Cardinal Ruggero Luigi Emidio Antici Mattei, executed the rite of coronation on 23 June 1867.

Munificentissimus Deus (Latin: The most bountiful God) is an apostolic constitution published in 1950 by Pope Pius XII. It defines ex cathedra the dogma of the Assumption of the Blessed Virgin Mary. It was the first and thus far the only ex-cathedra infallible statement since the official ruling on papal infallibility was made at the First Vatican Council (1869–1870). In 1854 Pope Pius IX had made an infallible statement with Ineffabilis Deus on the Immaculate Conception of the Virgin Mary, which was a basis for this dogma.

Notre Dame Cathedral (Luxembourgish: Kathedral Notre Dame, French: Cathédrale Notre-Dame, German: Kathedrale unserer lieben Frau) is the Catholic cathedral of the Archdiocese of Luxembourg, located in Luxembourg City in southern Luxembourg. It was originally a Jesuit church, and its cornerstone was laid in 1613. It is the only cathedral in Luxembourg. The church is an example of late Gothic architecture; however, it also has many Renaissance elements and adornments.

Pope Pius IX granted a Pontifical decree of coronation towards the Marian image of Our Lady of Consolation (Latin: Sancta Maria Consolatricis Afflictorum), the patron saint of both the city and the nation on 24 June 1866. The rite of coronation was executed by the former Archbishop of Munich, Cardinal Karl-August von Reisach on 2 July 1866. Fifty years later, the church was consecrated as the Church of Our Lady and in 1870, it was elevated to the Cathedral of Notre-Dame.

Pope Eugene III (Latin: Eugenius III; c. 1080 – 8 July 1153), born Bernardo, called Bernardo da Pisa, was head of the Catholic Church and ruler of the Papal States from 15 February 1145 to his death in 1153. He was the first Cistercian to become pope. In response to the fall of Edessa to the Muslims in 1144, Eugene proclaimed the Second Crusade. The crusade failed to recapture Edessa, which was the first of many failures by the Christians in the crusades to recapture lands won in the First Crusade. He was beatified in 1872 by Pope Pius IX.