The Vatican has formally excommunicated all members of the Society of Saint Pius X (SSPX), an ultra-conservative Catholic faction that defied papal authority by ordaining bishops without the approval of Pope Leo. The announcement was made last Thursday by Cardinal Víctor Manuel Fernández, head of the Holy See’s Dicastery for the Doctrine of the Faith, which oversees matters of church doctrine and discipline.

The SSPX, founded in 1970 in the Swiss village of Écône, has long been a source of tension within the Roman Catholic Church. The group rejects many post-Vatican II reforms and has maintained traditionalist views that have often put it at odds with the Vatican. The recent ordinations of bishops without papal consent led the Vatican to declare that the SSPX’s actions constituted a schism—a serious breach that effectively severs affiliation with the church.

Under canon law, such an act is subject to latae sententiae excommunication, meaning the sanction is incurred automatically upon committing the offense. Cardinal Fernández emphasized that the group’s unilateral ordinations represented a clear act of schismatic nature, deepening the division between the Vatican and the traditionalist faction.

The move marks a significant escalation in the longstanding difficulties between the Vatican and the SSPX, which has sought recognition and reconciliation with Rome over the decades but has also repeatedly challenged the authority of successive popes. The excommunication underscores the Holy See’s commitment to preserving unity and church discipline, particularly in relation to episcopal appointments, which are considered a prerogative of the pope.

Efforts to bridge differences have occurred intermittently since the SSPX’s establishment, but this recent development signals a hardening stance by the Vatican in response to what it views as continued disobedience and defiance of papal authority. The group’s response to the excommunication has not been detailed, and it remains unclear how this will impact ongoing dialogue or the status of its clergy and faithful.