Sedevacantism is a doctrinal position within traditionalist Catholicism, which holds that the present occupier of the Holy See is not a valid pope due to his espousal of one or more heresies and that, for lack of a valid pope, the See of Rome is vacant.
Traditionalist Catholicism is a movement encompassing members of the Catholic Church and offshoot groups of the Catholic Church that emphasizes beliefs, practices, customs, traditions, liturgical forms, devotions and presentations of teaching associated with the Catholic Church before the Second Vatican Council (1962–65). Traditionalist Catholics particularly emphasize the Tridentine Mass, the Roman Rite liturgy largely replaced in general use by the post-Second Vatican Council Mass of Paul VI.
The Congregation of Mary Immaculate Queen is a sedevacantist Traditionalist Catholic religious congregation. The CMRI is dedicated to promoting the message of Our Lady of Fátima and the devotion of the practice of Total Consecration to the Virgin Mary as taught by Saint Louis Marie de Montfort.
Kulturkampf was a political conflict that took place from 1872 to 1878 between the Catholic Church led by Pope Pius IX and the government of Prussia led by Otto von Bismarck. The main issues were clerical control of education and ecclesiastical appointments. A unique feature of Kulturkampf, compared to other struggles between the state and the Catholic Church in other countries, was Prussia's anti-Polish component. By extension, the term Kulturkampf is sometimes used to describe any conflict between secular and religious authorities, or deeply opposing values and beliefs between sizable factions within a nation, community, or other group.
Modernism in the Catholic Church attempts to reconcile Catholicism with modern culture, specifically an understanding of the Bible and Catholic tradition in light of the historical-critical method and new philosophical and political developments of the late 19th and early 20th centuries.
Americanism was, in the years around 1900, a political and religious outlook attributed to some American Catholics and denounced as heresy by the Holy See.
Francis Konrad Schuckardt was an American Traditionalist Catholic independent bishop.
Anthony J. Cekada was an American sedevacantist Catholic priest and author.
The Remnant is a Traditionalist Catholic newspaper published twice a month in the United States. Although its editors are not affiliated with any particular institute or traditionalist group, the paper is sympathetic to Archbishop Marcel Lefebvre and the Society of St. Pius X. Founded in 1968, it is the oldest Traditionalist Catholic newspaper in the United States.
Some hold the conspiracy theory which asserts that the conservative Cardinal Giuseppe Siri, then the Archbishop of Genoa, was elected pope in the 1958 papal conclave, taking the name Pope Gregory XVII, but that his election was suppressed. Siri did not associate himself with this idea.
Traditionalist conservatism, often known as classical conservatism, is a political and social philosophy that emphasizes the importance of transcendent moral principles, manifested through certain posited natural laws to which it is claimed society should adhere. Traditionalist conservatism, as we know it today, is primarily based on Edmund Burke's political views, although Toryism represented an even earlier, more primitive form of traditionalist conservatism. Traditionalists value social ties and the preservation of ancestral institutions above what they perceive as excessive individualism.
The New Oxford Review (NOR) is a magazine of traditionalist Catholic cultural and theological commentary. It was founded in 1977 by the American Church Union as an Anglo-Catholic magazine in the Anglican tradition to replace American Church News. It was named for the Oxford Movement of the 1830s and 1840s. In 1983, it officially "converted" to Catholicism.
Most Holy Family Monastery is a non-profit sedevacantist Feeneyite organization, based in Fillmore, New York. It is headed by two brothers, Brothers Michael and Peter Dimond. MHFM is known for its persistent defense of Feeneyism and their criticism of the Catholic doctrine of baptism of desire.
The question of whether Freemasonry is anticlerical is the subject of debate. The Catholic Church has long been an outspoken critic of Freemasonry, and some scholars have often accused the fraternity of anticlericalism. The Catholic Church forbids its members to join any Masonic society under pain of interdiction. Freemasons usually take a diametrically opposite view, stating that there is nothing in Freemasonry that is in any way contrary to Catholicism or any other religious faith.
John Todd Zuhlsdorf, also known as Father Z, is an American Catholic priest and traditionalist known for his blogging activities. Incardinated in the Diocese of Velletri-Segni, he lived and worked in the Diocese of Madison from 2014 to 2021, broadcasting a daily Tridentine Mass and issuing commentary on individuals and events from a traditionalist Catholic perspective.
Christopher A. Ferrara is an American Roman Catholic lawyer, anti-abortion activist, political pundit, and writer. He is the founder and president of the American Catholic Lawyers Association. He is also a regular columnist of The Remnant, a traditionalist Catholic newspaper.
Der Wahrheitsfreund or Der Wahrheits-Freund was the first German language Catholic newspaper in the United States, and one of many German-language newspapers in Cincinnati, Ohio during the nineteenth century. It was published by the Roman Catholic Archdiocese of Cincinnati, and proceeds went to the St. Aloysius Orphan Society.
Clerico-Nationalism was a right-wing ideology current in Quebec from the years after World War I until the end of the 1950s,. Clerico-nationalism was a traditionalist, religious form of French Canadian nationalism focused on the Roman Catholic Church. In France, a similar ideology was referred to as National Catholicism.
Donald J. Sanborn is an American sedevacantist bishop who is known for his advocacy of sedevacantism and sedeprivationism. He currently serves as the superior general of the sedevacantist Roman Catholic Institute (RCI) and rector of the sedevacantist Most Holy Trinity Seminary, which was relocated to Reading, Pennsylvania, United States, in 2022.
Moisés Carmona Rivera was a sedevacantist traditionalist Catholic bishop from Acapulco, Guerrero, Mexico, who propagated sedevacantism in Mexico. He was one of the bishops consecrated by the Vietnamese sedevacantist bishop Ngô Đình Thục.
