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Who compiled the Liber decretalium of Gregory IX?
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canon law
Council of Nicaea in 325, depicted in a Byzantine fresco in the basilica of St. Nicholas in Demre, Turkey.
The Liber decretalium of Gregory IX, also known as the Liber extra, was compiled by St. Raymond of PeƱafort, a Spanish Dominican canonist.123
At the direction of Pope Gregory IX, Raymond was commissioned in 1230 to codify papal statutes and rulings that had been issued since the appearance of Gratian's Decretum (c. 1140). The resulting compilation was formally promulgated by the Pope in 1234 as the exclusive codex for canon law following Gratian's work.423