Alexandrowicz, Piotr2015-02-022015-02-022014-06Adam Mickiewicz University Law Review, vol. 3, 2014, s. 13-242083-9782http://hdl.handle.net/10593/12639Gratian’s Decretum was one of the most significant legal collections in the history of canon law and was the foundation of canon law science. It was compiled in about 1140 as the consequence of many important factors. Firstly, the creation of Gratian’s Decretum was the result of various trends appearing in the history of canon law. Secondly, Decretum was an answer to the changes taking place in the Catholic Church in the 11th and 12th centuries. Finally, the formation of Gratian’s collection was related to the revival of Roman law: the teaching of Irnerius’s work recovered Roman law and the relations between canon and Roman law. Decretum became a sign of the vitality of Roman law and the beginning of canon law. The importance of Gratian’s work consisted in the method of proceeding with legal sources. The new method resulted from both scholars’ achievements and those of medieval Roman jurists.plinfo:eu-repo/semantics/openAccessRoman lawcanon lawGratian’s DecretumGregorian reformIus communeArtykuł