In the article the preconditions for the establishment of the Research Institute of Magdeburg Law (1940–1945) are highlighted. The city of Magdeburg shows the activities of the famous German scientist, Fritz Markman, who initiated the formation of the Institute and fulfilled duties as the mayor of Magdeburg, that made it possible to use the premises of the city archive and funds from the city budget for the needs of the Institute. Another famous German historian, Theodore Horitz, was appointed Director of the Magdeburg Law Research Institute. The purpose of the establishment of the Magdeburg Law Institute was a search in archives and libraries of Central and Eastern Europe countries for legal clarifications (notices) of volcanoes, ortils and other sources of Magdeburg law that were lost in Magdeburg in 1631 during the city fire. The Scientific Council of the Institute was formed, that included the most famous German historians of law, who investigated Magdeburg law. Scientific staff was engaged in the search for sources of Magdeburg Law, as well as Polish, Czech, Slovakian and Ukrainian researchers were involved on a paid basis. Among them are: I. Polonska-Vasylenko, P. Dombkovskiy, K. Okynshevych, O. Ogloblyn, A. Yakovliv and others. As a result of the activities of the members of the Scientific Council of the Institute photocopying of sources of Magdeburg Law was carried out and the work on their publishing has been carrying out. The works published in the framework of the scientific work of the Research Institute of Magdeburg Law are analyzed. This work was not completed because during the air attack of the Allied Air Force in January 1945 the premises of the Institute containing the archive with the collected papers were ruined, and the collected materials were destroyed. Only those materials that were in other places were preserved. German researchers, who took part in the projects of the Research Institute of Magdeburg Law after the end of the Second World War continued to work in the scientific institutions of the Federal Republic of Germany, German Democratic Republic and Austria. At present, a number of researchers in Central and Eastern Europe (reserchers of Germany, the Czech Republic, Slovakia, Poland, Ukraine, Hungary, Lithuania, Belarus, and others) are working on the problems of Magdeburg Law and the Saxon Zerzal. Since 2004, the project «Saxon-Magdeburg Law as a Cultural Element of the Relationships of the Legal Regimes of Central and Eastern Europe Countries» has been operating in the structure of the Saxon Academy of Sciences and involves law historians, philologists, historians, cultural experts from different European countries.