The following is a list of jarls and dukes, who ruled over Schleswig respectively Southern Jutland (Sønderjylland).
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👉 Duke of Schleswig in the context of Christian I of Denmark
Christian I (Christiern I) (February 1426 – 21 May 1481) was a German noble and Scandinavian monarch under the Kalmar Union. He was king of Denmark (1448–1481), Norway (1450–1481) and Sweden (1457–1464). From 1460 to 1481, he was also duke of Schleswig (within Denmark) and count (after 1474, duke) of Holstein (within the Holy Roman Empire). He was the first king of the House of Oldenburg.
In the power vacuum that arose following the death of King Christopher without a direct heir in 1448, Sweden elected Karl Knutsson king with the intent to reestablish the union under a Swedish king. Karl was elected king of Norway in the following year. However the counts of Holstein made the Danish Privy Council appoint Christian as king of Denmark. His subsequent accessions to the thrones of Norway (in 1450) and Sweden (in 1457) restored the unity of the Kalmar Union for a short period. In 1464, Sweden broke away from the union and Christian's attempt at a reconquest resulted in his defeat by the Swedish regent Sten Sture the Elder at the Battle of Brunkeberg in 1471.
In this Dossier
Duke of Schleswig in the context of Christian II of Denmark
Christian II (1 July 1481 – 25 January 1559), a monarch under the Kalmar Union, reigned as King of Denmark and Norway from 1513 until 1523. He was briefly King of Sweden from 1520 until 1521. As king of Denmark and Norway, he was concurrently Duke of Schleswig and Holstein in joint rule with his uncle Frederick.
As king, Christian tried to maintain the Kalmar Union between the Scandinavian countries which brought him to war with Sweden, lasting between 1518 and 1523. Though he captured the country in 1520, the subsequent slaughter of leading Swedish nobility, churchmen, and others, known as the Stockholm Bloodbath, caused the Swedes to rise against his rule. He was deposed in a rebellion led by the nobleman and later king of Sweden Gustav Vasa. He attempted to bring in a radical reform of the Danish state in 1521–22, which would have strengthened the rights of commoners at the expense of the nobles and clergy. The nobility rose against him in 1523, and he was exiled to the Netherlands, ceding the Danish throne to his uncle Frederick. After attempting to reclaim the thrones in 1531, he was arrested and held in captivity for the rest of his life, first in Sønderborg Castle and later at Kalundborg Castle. Supporters tried to restore him to power both during his exile and his imprisonment but they were defeated decisively during the Count's Feud in 1536. Christian died at Kalundborg in 1559.
Duke of Schleswig in the context of Frederick I of Denmark
Frederick I (Danish and Norwegian: Frederik; German: Friedrich; Swedish: Fredrik; 7 October 1471 – 10 April 1533) was King of Denmark and Norway from 1523 and 1524, respectively, until his death in 1533, and earlier co-duke Duke of Schleswig and Holstein.
A member of the House of Oldenburg, he was the youngest son of King Christian I and Dorothea of Brandenburg. Not originally destined for the throne, he received joint rule in Schleswig and Holstein on reaching his majority in 1490 and resided chiefly at Gottorf Castle.