Pius XI 1922-1939
Meetings to Procure the Unity of All Christians*
[From the Decree of the Holy Office, July 8, 1927]
2199 Whether it is permitted Catholics to be present at, or to take part in conventions, gatherings, meetings, or societies of non-Catholics which aim to associate together under a single agreement all who in any way lay claim to the name of Christian?
Reply: In the negative, and there must be complete adherence to the decree ( De participatione catholicorum societati,”ad procurandam christianitatis unitatem”) on the participation of Catholics in a society “to procure the unity of Christianity.” *