The Dicastery for the Doctrine of the Faith on Tuesday, 4 November 2025, published Mater populi fidelis (“The Mother of the Faithful People”), a Doctrinal Note “On Some Marian Titles Regarding Mary’s Cooperation in the Work of Salvation.” Signed by the Prefect, Cardinal Víctor Manuel Fernández, and the Secretary for the Dicastery’s Doctrinal Section, Monsignor Armando Matteo, the Note was approved by the Pope on 7 October.
Mater populi fidelis (MPF) is the fruit of a long and complex collegial effort. It is a doctrinal document on Marian devotion, centred on the figure of Mary, who is associated with the work of Christ as Mother of believers. The Note provides a significant biblical foundation for devotion to Mary, as well as marshalling various contributions from the Fathers, the Doctors of the Church, elements of Eastern tradition, and the thought of recent Popes.
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