 Thus understood, the term dates back to the 16th century and was officially sanctioned by Gregory XIII.The earliest editions of these texts printed under the now usual title of "Corpus juris canonici", date from the end of the 16th century (Frankfort, 8vo, 1586; Paris, fol., 1587).In the strict sense of the word the Church does not possess a "corpus juris clausum" ('closed body of law'), i. e. a collection of laws to which new ones cannot be added.