The Treaty of Kalmar (1397–1523) was a treaty that united the three Scandinavian kingdoms of Sweden, Denmark and Norway. It was signed on 25 September 1397 between representatives of the three kingdoms and established the Kalmar Union where all three realms were ruled by one monarch.
The Treaty of Kalmar (1397–1523) was an agreement that united Sweden, Denmark and Norway into a union. Signed on 25 September 1397, it established the Kalmar Union under which all three realms were ruled by one monarch.