Wilhelmine Schröder was the royal mistress of a man that was King of Sweden beginning in what year?
Wilhelmine Schröder: Fredrika Vilhelmina "Wilhelmine" Augusta Schröder (23 September 1839 - died 13 May 1924), was a Swedish telegraphist, writer and journalist, and was also the confidant and royal mistress of King Charles XV of Sweden. Charles XV of Sweden: Charles XV & IV also Carl ("Carl Ludvig Eugen"); Swedish: "Karl XV" and Norwegian: "Karl IV" (3 May 1826 – 18 September 1872) was King of Sweden ("Charles XV") and Norway ("Charles IV") from 1859 until his death.
1859