information:classification, stylistic:style_transfer
Early Scholastics (1070–1234)

Canon law knows a few forms of laws: the canones, decisions made by Councils, and the decreta, decisions made by the Popes. The monk Gratian, one of the well-known decretists, started to organise all of the church law, which is now known as the Decretum Gratiani, or simply as Decretum. It forms the first part of the collection of six legal texts, which together became known as the Corpus Juris Canonici. It was used by canonists of the Roman Catholic Church until Pentecost (19 May) 1918, when a revised Code of Canon Law (Codex Iuris Canonici) promulgated by Pope Benedict XV on 27 May 1917 obtained legal force.