The decree, structured in six chapters, underlines the dignity of the Oriental Churches. The Christian Orient holds many authentic riches that must be preserved. The existence of these Oriental Churches, different from the Latin Catholic Church does not endanger the Church’s unity. The maintenance in the Orient of the Patriarchate structure doesn’t affect the hierarchical structure’s functioning of the Church. The promotion of these Churches has shed a better light upon the non-Catholic Oriental Churches. In the same time, this document brings a novelty: the Catholic Church is not just the Latin Church; Orient and Occident (East and West) are like the two lungs through which the Church breathes.