"Louise de La Vallière (Françoise Louise de La Baume Le Blanc; 6 August 1644 – 7 June 1710) was a mistress of Louis XIV of France ...
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from 1661 to 1667. She later became the Duchess of La Vallière and Duchess of Vaujours in her own right. She has no known surviving descendants. Louise was also very religious and she led a religious penance for herself near the end of her life." - (en.wikipedia.org 28.10.2020)
