Sedevacantism is a traditionalist Catholic movement which holds that since the death of Pius XII the alleged occupiers of the Holy See are not valid popes due to their espousal of one or more heresies and that, for lack of a valid pope, the See of Rome is thus vacant. Sedevacantism owes its origins to the rejection of the theological and disciplinary changes implemented following the Second Vatican Council (1962–1965).
Marcel François Marie Joseph Lefebvre was a French Catholic archbishop who influenced modern traditional Catholicism. In 1970, five years after the close of the Second Vatican Council, he founded the Society of Saint Pius X (SSPX), a community to train seminarians in the traditional manner, in the village of Écône, Switzerland. In 1988, Pope John Paul II declared that Archbishop Lefebvre had "incurred the grave penalty of excommunication envisaged by ecclesiastical law" for consecrating four bishops against the pope's express prohibition but, according to Lefebvre, in reliance on an "agreement given by the Holy See ... for the consecration of one bishop."
The Tridentine Mass, also known as the Traditional Latin Mass or the Traditional Rite, is the liturgy in the Roman Missal of the Catholic Church codified in 1570 and published thereafter with amendments up to 1962. Celebrated almost exclusively in Ecclesiastical Latin, it was the most widely used Eucharistic liturgy in the world from its issuance in 1570 until the introduction of the Mass of Paul VI.
Traditionalist Catholicism is a movement that emphasizes beliefs, practices, customs, traditions, liturgical forms, devotions and presentations of teaching associated with the Catholic Church before the Second Vatican Council (1962–1965). 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.
Daniel Lytle Dolan was an American sedevacantist bishop.
The Society of Saint Pius X is a canonically irregular traditionalist Catholic fraternity of priests founded in 1970 by Archbishop Marcel Lefebvre. Lefebvre was a leading traditionalist at the Second Vatican Council with the Coetus Internationalis Patrum and Superior General of the Holy Ghost Fathers until 1968. The society was initially established as a pious union of the Catholic Church with the permission of François Charrière, the Bishop of Lausanne, Geneva and Fribourg in Switzerland.
Ecclesia Dei is the document Pope John Paul II issued on 2 July 1988 in reaction to the Ecône consecrations, in which four priests of the Society of Saint Pius X were ordained as bishops despite an express prohibition by the Holy See. The consecrating bishop and the four priests consecrated were excommunicated. John Paul called for unity and established the Pontifical Commission Ecclesia Dei to foster a dialogue with those associated with the consecrations who hoped to maintain both loyalty to the papacy and their attachment to traditional liturgical forms.
Bernard Fellay is a Swiss bishop and former superior general of the Traditionalist Catholic priestly fraternity Society of Saint Pius X (SSPX). In 1988, Pope John Paul II announced that Fellay and three others were automatically excommunicated for being consecrated as bishops by Archbishop Marcel Lefebvre, an act that the Holy See described as "unlawful" and "schismatic". Archbishop Lefebvre, and Bishop Antônio de Castro Mayer who co-consecrated these four bishops, were also said to be automatically excommunicated. At that time, he was the youngest bishop of the Roman Catholic Church at 30 years old.
Alfonso de Galarreta Genua,, is a Spanish-born Argentine bishop of the Society of Saint Pius X. Bishop de Galarreta has served as the First Assistant of the Society of Saint Pius X, working under the direction of the Superior General Fr. Davide Pagliarani, since 2018. In addition to this, Bishop de Galaretta has been the President of the SSPX—Vatican Commission since 2009, which directs the Society's correspondence with the Holy See.
The Pontifical Commission Ecclesia Dei was a commission of the Catholic Church established by Pope John Paul II's motu proprioEcclesia Dei of 2 July 1988 for the care of those former followers of Archbishop Marcel Lefebvre who broke with him as a result of his consecration of four priests of his Society of St. Pius X as bishops on 30 June 1988, an act that the Holy See deemed illicit and a schismatic act. It was also tasked with trying to return to full communion with the Holy See those traditionalist Catholics who are in a state of separation, of whom the Society of Saint Pius X (SSPX) is foremost, and of helping to satisfy just aspirations of people unconnected with these groups who want to keep alive the pre-1970 Roman Rite liturgy.
Clarence James Kelly was an American sedevacantist traditionalist Catholic bishop. He was a co-founder of the Society of Saint Pius V and the founder of the Congregation of Saint Pius V.
Anthony J. Cekada was an American sedevacantist Catholic priest and author.
The Écône consecrations were Catholic episcopal consecrations in Écône, Switzerland, on 30 June 1988 performed by Archbishop Marcel Lefebvre and Bishop Antônio de Castro Mayer. The bishops consecrated were four priests of Lefebvre's Society of Saint Pius X (SSPX). The consecrations, performed against the explicit orders of Pope John Paul II, represented a milestone in the troubled relationship of Lefebvre and the SSPX with the Church leadership. The Holy See's Congregation for Bishops issued a decree signed by its Prefect Cardinal Bernardin Gantin declaring that Lefebvre and De Castro Mayer had incurred automatic excommunication by consecrating the bishops without papal consent, thus putting himself and his followers in schism.
The Priestly Society of Saint Josaphat Kuntsevych (SSJK) is a society of traditionalist priests and seminarians originating from the Ukrainian Greek Catholic Church which is led by the excommunicated priest Basil Kovpak. It is based in Riasne, Lviv, Western Ukraine. In Lviv, the society maintains a seminary, at which currently thirty students reside, and takes care of a small convent of Basilian sisters. The SSJK is affiliated with the Society of St. Pius X and Holy Orders are conferred by the latter society's bishops in the Roman Rite. The SSJK clergymen, however, exclusively follow a version of Slavonic Byzantine Rite in the Ruthenian recension.
Summorum Pontificum is an apostolic letter of Pope Benedict XVI, issued in July 2007. This letter specifies the circumstances in which priests of the Latin Church could celebrate Mass according to what Benedict XVI called the "Missal promulgated by Blessed John XXIII in 1962" and administer most of the sacraments in the form used before the liturgical reforms that followed the Second Vatican Council.
The canonical situation of the Society of Saint Pius X (SSPX), a group founded in 1970 by Archbishop Marcel Lefebvre, is unresolved. The Society of Saint Pius X has been the subject of much controversy since 1988, when Bernard Fellay, Bernard Tissier de Mallerais, Richard Williamson and Alfonso de Galarreta were illicitly consecrated at Ecône, at the International Seminary of Saint Pius X as bishops in violation of canon law. Lefebvre and the four other SSPX bishops individually incurred a disciplinary latae sententiae excommunication for the schismatic act; the excommunications of the four living SSPX bishops were remitted in 2009.
Alfredo José Isaac Cecilio Francesco Méndez-Gonzalez was an American Catholic bishop who served in Puerto Rico and who later became involved with sedevacantists.
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.
