This seminar explores the transition from the late ancient to the medieval world through the lens of law and legal practice from the late Roman to the Carolingian empire. We look at how the different codifications built on earlier legal models and traditions but adopted and adapted them in their respective circumstances. We explore these processes until the ninth century when the Carolingian rulers came to rule an Empire which comprised a variety of different Roman and post Roman legal traditions and laws and were confronted with the challenge to find new ways and strategies for their coexistence, compatibility and convergence.