Background
Mariana, or Marianne as she was often called at the French-influenced court, was born as the child of Gustaf Fredrik Koskull and Anna Charlotta Gjelstrup.
Mariana, or Marianne as she was often called at the French-influenced court, was born as the child of Gustaf Fredrik Koskull and Anna Charlotta Gjelstrup.
She was appointed lady-in-waiting to Hedwig Elizabeth Charlotte of Holstein-Gottorp and became a center in the social circles of the court, where she was admired for her musicality (she was a good Harpplayer), and often played the main part in the amateur theatre at court. She was pointed out and known as the mistress of King Charles XIII after his accession to the throne in 1809, and eventually as the mistress also to his successor King Charles Bernadotte (crowned 1818), with whom she was said to have had a child. Historians have sometimes been uncertain, whether she actually functioned as a mistress, or only seemed to have this position.
Bernadotte tried to conceal the affair, while Koskull did the opposite: In June 1815, the queen remarked in her famous diaries that Koskull exposed new jewels so expensive that they were an obvious gift from the Prince.
A painting of her as the muse of music was placed in one of the salons of the king. In the back of the painting, another painting was placed with the image of a fortune teller.
When the painting was turned with the image of the fortune teller visible, it was a sign to Bernadotte that that day was her day with the king: if it was turned showing the image of the muse, then she would spend the day with Bernadotte. When she at one occasion flirted with the crown prince, the future king Oscar I of Sweden, the governor of the prince, Germund Ludvig Cederhielm, bursted out.
"Foreign God"s sake Mission, spare the third generation, you are corrupting them all at once!".