"Magdalene Sibylle of Saxony (23 December 1617 – 6 January 1668), in Denmark known as Magdalena Sibylla, was the Princess of Denmark from 1634 to 1647 ...
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as the wife of Prince-Elect Christian of Denmark, and the Duchess consort of Saxe-Altenburg as the wife of Frederick Wilhelm II, Duke of Saxe-Altenburg." - (en.wikipedia.org 15.02.2022)
