This contribution deals with the influence of the Reformation on the law in Denmark. The Reformation was basically a reform of the church, but it also affected the concept of law and state in general. In 1536, King Christian III dismissed the catholic bishops and withheld the property of the church. The king, as custos duarum tabularum, guardian of both the tablets of law, also took over the legislation for the church. Especially in subjects of morals and criminal law new principles and statutes were enacted. Copenhagen University was reformed into a protestant seminary even though the former faculties were maintained. For that task Johannes Bugenhagen was summoned who also drafted the new church ordinance of 1537. In marriage law protestant principles were introduced. A marriage order was established in 1582.