As a tribute to their academic teacher and to further his interests, the students of Prof. Dr. Laurent Waelkens collected fifteen scholarly contributions on ius commune graeco-romanum, written by academics from eleven different countries, mainly but not exclusively from Eastern Europe. The book consists of three main parts. In the first part, four authors focus on the Graeco-Roman law in the Roman Empire itself. In the second part, five contributions concern the influence of Graeco-Roman law outside of the Byzantine Empire. The six contributions of the third and final part study the impact of the Western ius commune tradition on Eastern European countries. Thus, the volume highlights the continued importance of the study of Roman law for the understanding of our common pan-European legal heritage.