Michel Louis Guérard des Lauriers, O.P. (1898 - February 27, 1988) was a Dominican theologian and traditionalist Catholic bishop.


A normalien and agrégé in mathematics, Michel-Louis Guérard des Lauriers entered the Dominican novitiate in 1926 and was ordained a priest in 1931. He became a professor of philosophy at the famous, clerical Dominican university of Le Saulchoir in Belgium in 1933. Under Pope Pius XII (1939-1958) Fr. Guérard des Lauriers served as a professor at the Pontifical Lateran University in Rome. Guérard des Lauriers O.P. was an advisor to the Pope on the dogma of the Assumption of Mary (Munificentissimus Deus) before 1950, from 1954 until 1955 he served as personal Father Confessor to Pius XII, before being replaced by Fr. Augustin Bea S.J.

With the advent of the Second Vatican Council in the 1960s, Guérard des Lauriers became concerned with the events taking place in the Church. In 1969 he co-authored the Ottaviani Intervention which was a critical study of the new Mass. In 1970 Pope Paul VI made public a document demanding the resignation of certain conservative professors at the pontifical universities of Rome, among them Guérard des Lauriers.

He then became a lecturer and professor at Archbishop Marcel Lefebvre's St. Pius X seminary in Ecône, Switzerland. He then presented his thesis that the Chair of Peter might be vacant because Pope Paul VI was guilty of heresy (see sedevacantism). Because of this view, Lefebvre removed Guérard des Lauriers from his seminary teaching post in 1977.

He further developed his beliefs on the current state of the papacy, relying on cardinal Cajetan and Robert Bellarmine, arguing that Pope Paul VI, as a result of his heresy, was not a true pope, being only pope materially (papa materialiter) and not formally, known as the Cassiciacum Thesis.

Guérard des Lauriers further believed that the new rites of ordination and episcopal consecration (newest Pontificale Romanum, new forms by promulgation of 18 June 1968) promulgated by Pope Paul VI were doubtfully valid (or even outrightly invalid) and therefore it was necessary to take action to secure a valid succession of bishops for the preservation of the (Latin rite) Roman Catholic Church. He began discussions with Dr. Eberhard Heller and Dr. Hiller, German sedevacantist activists who were harboring Most. Rev. Ngô Ðình Thuc Pierre Martin (1897-1985), the former archbishop of Hue, Vietnam, and after Guérard des Lauriers O.P. agreed to abate his Sedeprivationism and adhere to the theoretical tenets of Sedevacantism, it was agreed that Archbishop emeritus Ngo Dinh Thuc would consecrate him as a bishop.

Accordingly, after long consideration, on May 7, 1981, Guérard des Lauriers was consecrated bishop by Ngo Dinh Thuc in Toulon, France. Shortly after, Guérard des Lauriers reiterated his Sedeprivationism and commenced a polemical war with the Sedevacantists, including Ngo Dinh Thuc and Drs. Heller and Hiller.

Guérard des Lauriers died in Etoilles, France, in 1988 at the age of 90.

Episcopal Lineage
Consecrated by: Ngô Ðình Thuc Pierre Martin
Date of consecration: May 7, 1981
Consecrator of
Bishop Date of consecration
Gunther Storck April 30. 1984
Robert McKenna August 22, 1986
Franco Munari November 25, 1987


By Guérard des Lauriers

  • Le Saint-Esprit, âme de l'Eglise, Etiolles, Seine et Oise : Monastère de la Croix, 1948.
  • Garabandal, S.l., 1965.
  • Lettera ad un religioso di Simone Weil ; trad. di Mariella Bettarini. Risposta alla Lettera ad un religioso di Guérard des Lauriers ; trad. di Carmen Montesano (Lettre à un religieux), Torino : Borla, 1970.
  • La Mathématique, les mathématiques, la mathématique moderne, Paris : Doin, 1972.
  • Homélie (prononcée le 15 mai 1971 pour l'anniversaire de la mort de l'amiral de Penfentenyo de Kervéréguin), Versailles : R.O.C., 1973.
  • La Charité de la vérité, Villegenon : Sainte Jeanne d'Arc, 1985.
  • La Présence réelle du Verbe incarné dans les espèces consacrées, Villegenon : Sainte Jeanne d'Arc, 1987.

On des Lauriers' doctrin

  • Louis-Marie de Blignières, Le mystère de l'être. L'approche thomiste de Guérard des Lauriers, Paris, J. Vrin, 2008.

External links

This page uses content from the English Wikipedia. The original article was at Guerard des Lauriers. The list of authors can be seen in the page history.
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