Born in the prison of Niort, where her father was incarcerated as a Protestant; though well inoculated with Protestant principles she turned a Catholic, married the poet Scarron in 1652, became a widow in 1660; was entrusted with the education of the children of Louis XIV. and Madame de Montespan; supplanted the latter in the king's affections, and was secretly married to him in 1684; she exercised a great influence over him, not always for good, and on his death in 1715 retired into the Convent of St. Cyr, which she had herself founded for young ladies of noble birth but in humble circumstances (1635-1719).