Corpus Juris Canonici (1582) The Corpus contains the three major parts of the Corpus Juris Canonici: the Decretum of Gratian (ca. 1140), the Liber Extra of Gregory IX (1234), and the three final official decretal collections – the Liber Sextus of Boniface VIII, the Clementinae of John XXII, and the Extravagantes (first gathered by Jean Chappuis, 1499-1505).
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