A common feature of the Scandinavian political system which had developed by the mid-fourteenth century was the absence of larger political assemblies corresponding to European general estates and English parliaments. The only regular decision-making body alongside the Scandinavian kings was the aristocratic-clerical council of each realm. In 1397, the grand-nephew of Margrethe was crowned king of all three Scandinavian kingdoms in Kalmar. The two documents from the Kalmar meeting of 1397, the Act of Coronation and the Union Document, are the most debated in Scandinavian medieval research. The thirty-five years following the Kalmar meeting have been described as the Nordic union of the Act of Coronation. The union monarchy dominated the three realms beyond the purely local level. Subsequently, the union monarchy met with a crisis in the 1430s which it could not overcome. The chapter also discusses council constitutionalism, the constitutional situation in the period 1450-1513, and the local administration in Denmark, Sweden and Norway.