Marcel Lefebvre was born in Tourcoing, France, on 29 November 1905 and died in Martigny, Switzerland, on 25 March 1991 (Britannica). Ordained a priest in 1929, he joined the Holy Ghost Fathers and was sent to Gabon in 1932. Appointed vicar apostolic of Dakar and consecrated a bishop in 1947, he became apostolic delegate for French-speaking Africa in 1948 and was Archbishop of Dakar from 1955 to 1962. In 1962 he was elected superior general of the Holy Ghost Fathers, resigning in 1968 (Wikipedia; FSSPX).
Second Vatican Council. He took a leading part in the group of Council fathers that became known as the Coetus Internationalis Patrum and opposed the declaration on religious liberty, Dignitatis humanae, which he held to break with earlier papal teaching; he voted against it, though archival research later showed his signature on the promulgated documents, including Dignitatis humanae, a finding that Society publications disputed (Catholic Culture; CNA; National Catholic Register).
The Society of Saint Pius X. At the request of seminarians seeking a traditional formation, he founded the Society of Saint Pius X, erected in the Diocese of Lausanne, Geneva and Fribourg on 1 November 1970, with its seminary at Écône (timeline). After his declaration of 21 November 1974 rejecting the conciliar reform, the local bishop withdrew the Society's approval in May 1975 — a step the Society regards as unlawful — and in July 1976 Lefebvre was suspended a divinis for ordaining priests against Rome's instruction (Wikipedia; fsspx.uk; Britannica).
1988 consecrations. On 30 June 1988 at Écône, with Bishop Antônio de Castro Mayer, he consecrated four bishops without papal mandate. A decree of the Congregation for Bishops dated 1 July 1988 declared that Lefebvre and the four new bishops, Bernard Fellay, Bernard Tissier de Mallerais, Richard Williamson and Alfonso de Galarreta, had incurred excommunication, as had de Castro Mayer as co-consecrator (EWTN Library). John Paul II's motu proprio Ecclesia Dei of 2 July called the act schismatic.
Legacy. He was buried in a crypt beneath the Écône seminary. The Society's publishing house, Angelus Press, publishes a biography by Bishop Bernard Tissier de Mallerais (Angelus Press). The Society he founded consecrated further bishops in July 2026 and was then declared by the Holy See to be in schism, which it disputes (see SSPX consecrations of 2026).