Christian I of Denmark noble title count
Biography
Early years
Christian I was born in February 1426 in Oldenburg in Northern Germany as the eldest son of Count Dietrich of Oldenburg by his second wife, Helvig of Holstein (died 1436). Christian had two younger brothers, Maurice (1428–1464) and Gerhard (1430–1500), and one sister Adelheid.Through his father, he belonged to the House of Oldenburg, a comital family established since the 12th century in an area west of the River Weser in north-western Germany. Based on the two strongholds of Oldenburg and Delmenhorst, the family had gradually expanded its rule over the neighbouring Frisian tribes of the area. Christian's father was called the Fortunate as he had reunited and expanded the family's territory. Christian's mother, Helvig, was a daughter of Gerhard VI, Count of Holstein, and a sister of Adolphus, Duke of Schleswig. Through his mother, Christian was also a cognatic descendant of King Eric V of Denmark through his second daughter Richeza (died 1308) and also a cognatic descendant of King Abel of Denmark through his daughter Sophie. Through his father, Christian was a cognatic descendant of King Eric IV of Denmark through his daughter Sophia. Christian thus descended from the three surviving sons of Valdemar II and his second wife Berengaria of Portugal.At the death of their father in 1440, Christian and his brothers jointly succeeded Dietrich as Count of Oldenburg and Delmenhorst. Christian was raised by his uncle, Duke Adolphus of Schleswig, Count of Holstein (1401–1459) as the childless duke wished for his young nephew to become his heir, and also succeeded in having Christian elected as his successor in the Duchy of Schleswig.King of Denmark
In January 1448, King Christopher of Denmark, Sweden and Norway died suddenly and without natural heirs. His death resulted in the break-up of the union of the three kingdoms, as Denmark and Sweden went their separate ways and Norway's affiliation was unclear. The vacant Danish throne was first offered by the Council of the Realm to Duke Adolphus of Schleswig, being the most prominent feudal lord of Danish dominions. The duke declined and recommended his nephew, Count Christian of Oldenburg. Before being elected, Christian had to promise to obey to the Constitutio Valdemariana, a provision in the ascension promissory of King Valdemar III of Denmark, that promised that in the future, the same person could never be both ruler of the Duchy of Schleswig and Denmark simultaneously. The council also demanded that Christian should marry dowager queen Dorothea of Brandenburg (ca 1430–1495), widow of his predecessor King Christopher III. On 1 September 1448, after signing his ascension promissory, count Christian was elected to the Danish throne as king Christian I at the assembly in Viborg. His coronation was held on 28 October 1449, in the Church of Our Lady in Copenhagen, at which occasion his marriage with dowager queen Dorothea was also celebrated.Duke and Count
In 1460 King Christian also became Duke of Schleswig, a Danish fief, and Count of Holstein-Rendsburg, a Saxe-Lauenburgian subfief within the Holy Roman Empire. Christian inherited Holstein-Rendsburg and Schleswig after a short "interregnum" as the eldest son of the sister of late Duke Adolphus VIII, Duke of Schleswig (Southern Jutland) and Count of Holstein, of the Schauenburg fürst clan, who died 4 December 1459, without heirs. Christian's succession was confirmed by the Estates of the Realm (nobility and representatives) of these duchies in Ribe 5 March 1460 (Treaty of Ribe). In 1474 Lauenburg's liege lord Emperor Frederick III elevated Christian I as Count of Holstein to Duke of Holstein, thus becoming an immediate imperial vassal (see imperial immediacy).
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