The House of Oldenburg is a European dynasty of North German origin. It is one of Europe's most influential royal houses, with branches that rule or have ruled in Denmark, Iceland, Greece, Norway, Russia, Sweden, Schleswig, Holstein, and Oldenburg. The current Queen of Denmark and King of Norway, the former King of Greece, the consort of the monarch of the United Kingdom, as well as the first fourteen persons in the line of succession to the British throne, are all patrilineal members of the Glücksburg branch of this house. The dynasty rose to prominence when Count Christian I of Oldenburg was elected as King of Denmark in 1448, of Norway in 1450 and of Sweden in 1457. The house has occupied the Danish throne ever since.