The intertwinement of Roman (civil) law and canon law in the medieval Eu- rope is commonly designated as "both laws” (ius utrumque). Medieval canon law was a universal law, which emerged from ecclesiastical as well as ancient Roman legal sources and was at its core a product of scholastic ecclesiastical science of canon lawyers as well as papal legislation. The article outlines three centuries of development and the core content of ecclesiastical legal collections in the period of the classical age of canonist science (12th−14th centuries). The period is characterised primarily by the private collection of canon sources Decretum Gratiani (1140), the most extensive medieval official codification – Liber Extra (1234) as well as its additions Liber Sextus (1298), Clementinae (1317) and Extravagantes. The mission of the papal legislation was to upgrade Roman law provisions in the light of Gospel and theological teachings. The law-making activity of the Church, resembling the vocation of Roman prae- tor, facilitated the reception Roman law in a society governed by the values of Christian morality.

Key words: Canon law, Roman law, reception of Roman law, Catholic Church, codification, Code of Canon Law, Christianity, Middle Ages.

In commemoration of the 500th anniversary of Martin Pegius’s birth (1523– 1592), the esteemed Carniolian jurist, renowned for his ground-breaking sci- entific contributions on the field of law, an exhibition showcasing his works is taking place in the foyer of the Faculty of Law library. The curated collection includes the original edition of his Tractatus on servitudes (1558), a facsimile of a partial translation of Justinian’s Code (1566), the Essays of Legal Opin- ions (1564), and a facsimile of Pegius’s astrological Book of Birth Hours (1570) published in 1924. Visitors have the unique opportunity to acquaint them- selves with the newly discovered stylised portrayal of Martin Pegius, artfully preserved on his tombstone in Salzburg.

Key words: Martin Pegius, legal scholar, exhibition of works, Faculty of Law University of Ljubljana.