Benedictus Deus (Pius IV)
Jus novum c. 1140-1563
Jus novissimum c. 1563-1918
Jus codicis 1918-present
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Benedictus Deus is a papal bull calculation by Pius IV in 1564 which ratified all decrees and definitions of the Council of Trent. It maintain that the decrees of the Council of Trent can be interpreted solely by the Papal group itself; and enjoins strict obedience upon any Catholics, forbidding, under pain of excommunication, all unauthorized interpretation. This was seen by Church contemporaries of Pius IV as an attempt to strengthen the influence of the Papacy against the rise of Conciliarism exemplified by the Council of Trent itself.
There is a more minor bull of the same title sum by Benedict XII in 1336.