An Instruction of the Holy Office
Addressed to the ordinaries of places, given December 20, 1949.
The Catholic Church, although she does not take part in congresses and other conventions called “ecumenical,” yet has never ceased, as is clear from many Pontifical documents, nor will she in future ever cease, to follow with the most intense interest and to promote by earnest prayers to God, all efforts toward the attainment of what is so dear to the Heart of Christ Our Lord, namely, that all who believe in Him “may be made perfect in one.”[1]

This is a companion discussion topic for the original entry at https://ordoevangelistarum.com/on-the-ecumenical-movement/