Melvyn Bragg and guests discuss the ideas brought together under Justinian I, Byzantine emperor in the 6th century AD, which were rediscovered in Western Europe in the Middle Ages and became very influential in the development of laws in many European nations and elsewhere. With Caroline Humfress Professor of Medieval History at the University of St Andrews Simon Corcoran Lecturer in Ancient History at Newcastle University and Paul du Plessis Senior Lecturer in Civil law and European legal history at the School of Law, University of Edinburgh Producer: Simon Tillotson.