Career
She was the official royal mistress of Charles I, Landgrave of Hesse-Kassel in 1711-1730, and the political adviser, first lady and head of the court of William VIII, Landgrave of Hesse-Kassel between in 1730-1756. She was the daughter of the Hessian noble and officer Johann Ludwig von Bernhold and Anna Lucretia Stain. She became the head of the court of William in 1730, and because his consort Dorothea Wilhelmine of Saxe-Zeitz was imprisoned because of mental illness, she acted ceremoniously as the first lady of the court.
She also exerted political influence over William, as he made her his political adviser.
She was housed in the Bellevue Palace.