The term Extravagantes (from the Latin extra, outside; vagari, to wander) is applied to the canon law of the Roman Catholic Church, to designate some papal decretals not contained in certain canonical collections which possess a special authority. More precisely, they are not found in the Decree of Gratian or the three official collections of the Corpus Juris (the Decretals of Gregory IX, the Sixth Book of the Decretals, and the Clementines).