Andrzej Dziadzio, Ph.D. (1994), is Professor of Law and Head of the Department of Common History of the State and the Law at the Jagiellonian University in Kraków.Franciszek Longchamps de Bérier, Ph.D. (1997), is Professor of Law and Head of the Department of Roman Law at the Jagiellonian University in Kraków. He also teaches at the Faculty of Law and Administration of the University of Warsaw, Poland.