Why does the Catholic Church forbid membership in Freemasonry and masonic organizations?
A brief history
Freemasonry began as a guild of stonemasons in the early‑to‑mid‑17th century, but by the late‑17th century it had transformed into a fraternity that admitted men who were not actual builders. The first modern lodges appeared in England and the Low Countries around 1717, and the movement quickly spread throughout Europe, becoming a trans‑national phenomenon by the 18th century.
During the 18th century Freemasonry reached the United States, Latin America and parts of Asia, establishing a network of secret, oath‑bound associations that presented themselves as universal brotherhoods.
The Church’s Condemnation
The Church’s condemnation of Freemasonry rests on several fundamental reasons that have been articulated repeatedly from Pope Leo XIII’s encyclical Humanum Genus (1884) through the Dicastery for the Doctrine of the Faith’s 2023 Declaration on Masonic Organizations. Several principles and practices of Freemasonry have been deemed intrinsically opposed to the faith, making membership a grave sin and barring the faithful from Holy Communion. These principles and practices include:
- Naturalistic rationalism and indifferentism – Freemasonry promotes the idea that all religions are equal and that religion is a matter of personal preference, thereby undermining the exclusive truth of the Catholic faith.
- Secret oaths and the culture of secrecy – The obligatory oaths and hidden rituals are viewed as a “perverse” commitment that subverts the believer’s loyalty to Christ and the Church.
- Subversive aims – Many examples may be found in the historical record of Freemasonry seeking to diminish the Church’s moral and civic influence, advocating the separation of Church and State and the removal of religious authority from public life.
Magisterial Teaching
Freemasonry has been addressed repeatedly by the Magisterium in a series of papal documents, encyclicals, apostolic letters and recent Congregation pronouncements. The most frequently cited sources include:
- Humanum Genus (Encyclical, 1884, Pope Leo XIII) – a systematic condemnation of Masonic principles and a call to the faithful to resist its influence.
- Quo Graviora (Apostolic Constitution, 1833, Pope Gregory XVI) – reiterates the prohibition begun by Pope Clement XII’s In eminenti and condemns all societies of “Liberi Muratori”.
- In eminenti (Apostolic Letter, 1738, Pope Clement XII) – the first papal decree expressly forbidding Catholics from joining Masonic associations, repeatedly cited by later popes.
- Officio Sanctissimo (Letter, 1887, Pope Leo XIII) – urges bishops to guard their flocks against the “wicked faction” of Freemasonry.
- Inimica Vis (Letter to the Bishops of Italy, 1892, Pope Leo XIII) – describes Freemasonry as a chief enemy of the Church.
- The Syllabus of Errors (Encyclical, 1864, Pope Pius IX) – includes a denunciation of Masonic “sectes” as threats to the Church and the state.
- Declaration on Masonic Associations (Congregation for the Doctrine of the Faith, 26 Nov 1983) – affirms the irreconcilability of Masonic principles with Catholic faith and outlines canonical penalties.
- Response to Bishop Julito Cortes (Dicastery for the Doctrine of the Faith, 13 Nov 2023) – reiterates the 1983 declaration and proposes a coordinated pastoral strategy for the Philippines.
Canon Law
The 1917 Pio-Benedictine Code of Canon Law listed Freemasonry by name in canon 2335, declaring that Catholics who joined such societies incurred a latae sententiae excommunication:
Canon 2335. Those who give their name to a Masonic sect or other associations of the same kind which plot against the Church or legitimate civil powers, ipso facto incur an excommunication simply reserved to the Apostolic See.
This canon was superseded by the 1983 Code of Canon Law, so the Church’s current juridical response to Freemasonry is carried out implicitly through the current Canon 1374:
Canon 1374 – Penalty for joining an association that plots against the Church
“A person who joins an association which plots against the Church is to be punished with a just penalty; however, a person who promotes or directs an association of this kind is to be punished with an interdict.”
Conclusion
At this point we should quote directly from the 1983 Declaration on Masonic Associations, issued by the Congregation for the Doctrine of the Faith and cited above:
Precisely by considering all these elements, the Declaration of the Sacred Congregation affirms that membership in Masonic associations “remains forbidden by the Church”, and the faithful who enrolls in them “are in a state of grave sin and may not receive Holy Communion“.
With this last statement, the Sacred Congregation points out to the faithful that this membership objectively constitutes a grave sin and by specifying that the members of a Masonic association may not receive Holy Communion, it intends to enlighten the conscience of the faithful about a grave consequence which must derive from their belonging to a Masonic lodge.
Finally, the Sacred Congregation declares that “it is not within the competence of local ecclesiastical authorities to give a judgment on the nature of Masonic associations which would imply a derogation from what has been decided above“.
This canon and documents provided above form the core magisterial teaching that Catholic participation in Freemasonry is forbidden because its doctrines are fundamentally opposed to the faith.
