Frederikke Dannemand was the royal mistress of which King?
Frederick VI of Denmark Frederick VI (Danish and Norwegian: "Frederik"; 28 January 17683 December 1839) was King of Denmark from 13 March 1808 to 3 December 1839 and King of Norway from 13 March 1808 to 7 February 1814. From 1784 until his accession, he served as regent during his father's mental illness and was referred to as the "Crown Prince Regent" ("kronprinsregent"). For his motto he chose "God and the just cause" (Danish: "Gud og den retfærdige sag" ) and since the time of his reign, succeeding Danish monarchs have also chosen mottos in the Danish language rather than the formerly customary Latin.
Wilhelmine Dorothee von der Marwitz Wilhelmine Dorothee von der Marwitz (April 1718-16 January 1787), was the royal mistress of Frederick, Margrave of Brandenburg-Bayreuth, from the late 1730s until 1744. She was also the host of an influential salon in Vienna in the 1780s.