The relationship between state law and religious law is one of the central points of tension in modern legal systems within religiously pluralistic societies. In this study, the author gives a comparative analysis of the treatment of interreligious marriages in Israel, Lebanon, and Tunisia and investigates the reception of a religion-based ban on marriage by German courts. Central focal points are models of legal pluralism, the manner in which state systems adopt religious norms, and state oversight of religious authority. Whereas Israel and Lebanon give religious courts broad competence, Tunisia has put the question of personal status largely in the hands of state authorities. The study makes a valuable contribution to the debate on the integration of religious normativity in secular contexts in the international and German legal arena.