Liber Extra
Under the name of "corpus canonum" ('body of canons') were designated the collection of Dionysius Exiguus and the "Collectio Anselmo dedicata" (see below). The "Decretum" of Gratian is already called "Corpus juris canonici" by a glossator of the 12th century, and Innocent IV calls by this name the "Decretales" or Decretals of Gregory IX.