- Ecclesiam Suam [1], Paul VI This 1964 encyclical is a sustained reflection on dialogue and it is the first use of the term in church documents.
- Relation of the Church to Non-Christian Religions (Nostra aetate) [2] The Vatican II document which launched dialogue with other religions.
- Constitution on the Church in the Modern World (Gaudium et spes) [3] The last major document of Vatican II, this pastoral constitution broke new ground when it advocated dialogue with the contemporary world.