Thomas Duve is director at the Max Planck Institute for Legal History and Legal Theory (Frankfurt am Main) and professor for Comparative Legal History at the Goethe University Frankfurt. He is one of the directors of the research project The School of Salamanca. His research focuses on the legal history of the early modern age and the modern era.José Luis Egío is member of the research project The School of Salamanca (Academy of Sciences Mainz, MPI, Goethe University). He has published monographs and articles on the history of philosophy, law and theology in early modern Spain, France and Mexico.Christiane Birr is coordinator of the research project The School of Salamanca (Academy of Sciences Mainz, MPI, Goethe University). Her research areas are the School of Salamanca, canon law, learned law, and constitutional law (14-16th centuries).