This document provides an agenda for the "Seminar NiklasLuhmann: 20 Years of DasRecht der Gesellschaft" event held from November 11-13, 2013. The seminar featured four sessions over three days covering topics related to Niklas Luhmann's sociological theory of law. Presentations and panels were held each day exploring themes such as Luhmann's theory between sociology and legal theory, the differentiation of law, the relationship between society and law, and law and structural coupling regarding constitutionalism and transconstitutionalism. The event concluded with a closing conference on political structure, constitutions, and transnational law.