This long work by Father Clément Barré, a priest of the Archdiocese of Bordeaux, was published on May 28, 2026, not long before the episcopal consecrations of the Society of Saint Pius X (July 1st, 2026), but months after they had been announced. We post an English translation here for the record of events.
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The SSPX's Ecclesiology of Substitution
From the Distinction Between "True Rome" and "False Rome" to the Justification of Consecrations Without a Pontifical Mandate Based on Primary Sources of the SSPX (La Porte Latine, FSSPX Actualités, DICI)
by Father Clément Barré
Archdiocese of Bordeaux
Author's note: This article draws extensively on the work of Father Albert Jacquemain, whom we cite in the introduction. It is from him that we receive the thesis this study seeks to demonstrate.
Introduction
The Society of Saint Pius X, founded in 1970 by Archbishop Marcel Lefebvre, presents itself officially as a work in the service of the Catholic and Roman Church, not as an alternative to it.

