Pope Pius XI in the context of "Roman Question"

The Lateran Treaty (Italian: Patti Lateranensi; Latin: Pacta Lateranensia) was one component of the Lateran Pacts of 1929, agreements between Italy under King Victor Emmanuel III and Prime Minister Benito Mussolini and the Holy See under Pope Pius XI to settle the long-standing Roman question. The treaty and associated pacts were named after the Lateran Palace, where they were signed on 11 February 1929. The Italian Parliament ratified them on 7 June 1929.

The treaty recognised Vatican City as an independent state under the sovereignty of the Holy See. Italy also agreed to give the Catholic Church financial compensation for the loss of the Papal States. In 1948, the Lateran Treaty was recognized in the Constitution of Italy as regulating the relations between the Italian Republic and the Catholic Church. While the treaty was significantly revised in 1984, ending the status of Catholicism as the sole state religion of Italy, the Vatican remains a distinct sovereign entity to the present day.

The Ambrosian Rite (Italian: Rito Ambrosiano) is a Latin liturgical rite of the Catholic Church and the Eastern Orthodox Church (specifically The Divine Liturgy of Saint Ambrose). The rite is named after Saint Ambrose, a bishop of Milan in the fourth century. It is used by around five million Catholics in the greater part of the Archdiocese of Milan (excluding Monza, Treviglio and Trezzo sull'Adda), in some parishes of the Diocese of Como, Bergamo, Novara, Lodi, in the Diocese of Lugano, Canton of Ticino, Switzerland, less prominently in some Western Rite orthodox parishes and on special occasions of other jurisdictions.

The Ambrosian Rite has risked suppression at various points in its history. It was reformed after the Second Vatican Council (Pope Paul VI belonged to the Ambrosian Rite, having previously been Archbishop of Milan). In the 20th century, it also gained prominence and prestige from the attentions of two other scholarly Archbishops of Milan: Achille Ratti, later Pope Pius XI, and the Blessed Ildefonso Schuster, both of whom were involved in studies and publications on the rite.

Charles-Marie-Photius Maurras (/mɔːˈrɑːs/; French: [ʃaʁl moʁas]; 20 April 1868 – 16 November 1952) was a French author, politician, poet and critic. He was an organiser and principal philosopher of Action Française, a political movement that was monarchist, medievalist, conservative, corporatist, integralist, nationalist, traditionalist, and counter-revolutionary. Maurras also held anti-capitalist, anti-communist, anti-liberal, anti-Masonic, anti-Nazi, anti-Protestant and antisemitic views. His ideas greatly influenced National Catholicism and integral nationalism, and led to the political doctrine of Maurrassisme.

Raised Roman Catholic, Maurras went deaf and became an agnostic in his youth, but remained anti-secularist and politically supportive of the Catholic Church. An Orléanist, he began his career by writing literary criticism and became politically active as a leading anti-Dreyfusard. In 1926 Pope Pius XI issued a controversial papal condemnation of Action Française, which was swiftly repealed by Pope Pius XII in 1939. Maurras was elected to the Académie Française in 1938, and later expelled in 1945.

Guglielmo Giovanni Maria Marconi, 1st Marquess (/mɑːrˈkoʊni/ mar-KOH-nee; Italian: [ɡuʎˈʎɛlmo marˈkoːni]; 25 April 1874 – 20 July 1937), was an Italian radio-frequency engineer, inventor, and politician known for his creation of a practical radio wave-based wireless telegraph system. This led to him being largely credited as the inventor of radio and sharing the 1909 Nobel Prize in Physics with Ferdinand Braun "in recognition of their contributions to the development of wireless telegraphy."His work laid the foundation for the development of radio, television, and all modern wireless communication systems.

As an entrepreneur and a businessman, Marconi founded the Marconi Company in the United Kingdom in 1897. In 1929, he was ennobled as a marquess (Italian: marchese) by Victor Emmanuel III. In 1931, he set up Vatican Radio for Pope Pius XI.

The Cathedral Church and Minor Basilica of the Immaculate Mother of God, Help of Christians, Patroness of Australia, locally known as Saint Mary's Cathedral, is a Catholic basilica and the seat of the Archdiocese of Sydney. The cathedral is dedicated to the Blessed Virgin Mary under the venerated title of “Our Lady, Help of Christians" and Patroness of Australia.

Pope Pius XI raised the shrine to the status of Minor Basilica via the Pontifical decree Inter Potiores Sacras on 4 August 1932. Pope Benedict XVI made an Apostolic Visit to the shrine in 19 July 2008.

The Roman question (Italian: Questione romana; Latin: Quaestio Romana) was a dispute regarding the temporal power of the popes as rulers of a civil territory in the context of the Italian Risorgimento. It ended with the Lateran Pacts between King Victor Emmanuel III and Prime Minister Benito Mussolini of Italy and Pope Pius XI of the Holy See in 1929.

The Basilica della Santa Casa (English: Basilica of the Holy House) is a Marian shrine in Loreto, in the Marches, Italy. The basilica is known for enshrining the house in which the Blessed Virgin Mary is believed by some Catholics to have lived. Pious legends claim the same house was flown over by angelic beings from Nazareth to Tersatto (Trsat in Croatia), then to Recanati, before arriving at the current site.

The basilica is also known for enshrining the Madonna and Child image of "Our Lady of Loreto". Pope Benedict XV designated her under this title as patroness of air passengers and auspicious travel on 24 March 1920. Pope Pius XI granted a Canonical Coronation to the venerated image made of Cedar of Lebanon wood on 5 September 1922, replacing the original Marian image consumed in fire on 23 February 1921.

The Archdiocese of Milan (Italian: Arcidiocesi di Milano; Latin: Archidioecesis Mediolanensis) is a Latin Church ecclesiastical territory or archdiocese of the Catholic Church in Italy which covers the areas of Milan, Monza, Lecco and Varese. It has long maintained its own Latin liturgical rite usage, the Ambrosian rite, which is still used in the greater part of the diocesan territory. Among its past archbishops, the better known are Ambrose, Charles Borromeo, Pope Pius XI and Pope Paul VI.

The Archdiocese of Milan is the metropolitan see of the ecclesiastical province of Milan, which includes the suffragan dioceses of Bergamo, Brescia, Como, Crema, Cremona, Lodi, Mantova, Pavia, and Vigevano.